mirror of
https://github.com/xcp-ng/xenadmin.git
synced 2024-11-23 12:30:50 +01:00
605 lines
26 KiB
C#
Executable File
605 lines
26 KiB
C#
Executable File
/* Copyright (c) Cloud Software Group, Inc.
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*
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* Redistribution and use in source and binary forms,
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* with or without modification, are permitted provided
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* that the following conditions are met:
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*
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* * Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the
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* following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the
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* following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Reflection;
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using XenAPI;
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using XenAdmin.Core;
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using XenAdmin.Model;
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using System.Linq;
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using System.Diagnostics;
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using XenCenterLib;
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namespace XenAdmin.Network
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{
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public class Cache : ICache
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{
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#pragma warning disable 0414
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// keep sorted please
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private readonly ChangeableDictionary<XenRef<Blob>, Blob> _blob = new ChangeableDictionary<XenRef<Blob>, Blob>();
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private readonly ChangeableDictionary<XenRef<Bond>, Bond> _bond = new ChangeableDictionary<XenRef<Bond>, Bond>();
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private readonly ChangeableDictionary<XenRef<Certificate>, Certificate> _certificates = new ChangeableDictionary<XenRef<Certificate>, Certificate>();
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private readonly ChangeableDictionary<XenRef<Cluster_host>, Cluster_host> _cluster_host = new ChangeableDictionary<XenRef<Cluster_host>, Cluster_host>();
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private readonly ChangeableDictionary<XenRef<Cluster>, Cluster> _cluster = new ChangeableDictionary<XenRef<Cluster>, Cluster>();
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private readonly ChangeableDictionary<XenRef<XenAPI.Console>, XenAPI.Console> _console = new ChangeableDictionary<XenRef<XenAPI.Console>, XenAPI.Console>();
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private readonly ChangeableDictionary<XenRef<Crashdump>, Crashdump> _crashdump = new ChangeableDictionary<XenRef<Crashdump>, Crashdump>();
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private readonly ChangeableDictionary<XenRef<DockerContainer>, DockerContainer> _dockerContainers = new ChangeableDictionary<XenRef<DockerContainer>, DockerContainer>();
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private readonly ChangeableDictionary<XenRef<Feature>, Feature> _feature = new ChangeableDictionary<XenRef<Feature>, Feature>();
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private readonly ChangeableDictionary<XenRef<Folder>, Folder> _folders = new ChangeableDictionary<XenRef<Folder>, Folder>();
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private readonly ChangeableDictionary<XenRef<GPU_group>, GPU_group> _gpu_groups = new ChangeableDictionary<XenRef<GPU_group>, GPU_group>();
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private readonly ChangeableDictionary<XenRef<Host_cpu>, Host_cpu> _host_cpu = new ChangeableDictionary<XenRef<Host_cpu>, Host_cpu>();
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private readonly ChangeableDictionary<XenRef<Host_crashdump>, Host_crashdump> _host_crashdump = new ChangeableDictionary<XenRef<Host_crashdump>, Host_crashdump>();
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private readonly ChangeableDictionary<XenRef<Host_metrics>, Host_metrics> _host_metrics = new ChangeableDictionary<XenRef<Host_metrics>, Host_metrics>();
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private readonly ChangeableDictionary<XenRef<Host_patch>, Host_patch> _host_patch = new ChangeableDictionary<XenRef<Host_patch>, Host_patch>();
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private readonly ChangeableDictionary<XenRef<Host>, Host> _host = new ChangeableDictionary<XenRef<Host>, Host>();
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private readonly ChangeableDictionary<XenRef<Message>, Message> _message = new ChangeableDictionary<XenRef<Message>, Message>();
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private readonly ChangeableDictionary<XenRef<Network_sriov>, Network_sriov> _network_sriov = new ChangeableDictionary<XenRef<Network_sriov>, Network_sriov>();
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private readonly ChangeableDictionary<XenRef<XenAPI.Network>, XenAPI.Network> _network = new ChangeableDictionary<XenRef<XenAPI.Network>, XenAPI.Network>();
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private readonly ChangeableDictionary<XenRef<PBD>, PBD> _pbd = new ChangeableDictionary<XenRef<PBD>, PBD>();
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private readonly ChangeableDictionary<XenRef<PCI>, PCI> _pcis = new ChangeableDictionary<XenRef<PCI>, PCI>();
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private readonly ChangeableDictionary<XenRef<PGPU>, PGPU> _pgpu = new ChangeableDictionary<XenRef<PGPU>, PGPU>();
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private readonly ChangeableDictionary<XenRef<PIF_metrics>, PIF_metrics> _pif_metrics = new ChangeableDictionary<XenRef<PIF_metrics>, PIF_metrics>();
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private readonly ChangeableDictionary<XenRef<PIF>, PIF> _pif = new ChangeableDictionary<XenRef<PIF>, PIF>();
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private readonly ChangeableDictionary<XenRef<Pool_patch>, Pool_patch> _pool_patch = new ChangeableDictionary<XenRef<Pool_patch>, Pool_patch>();
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private readonly ChangeableDictionary<XenRef<Pool_update>, Pool_update> _pool_update = new ChangeableDictionary<XenRef<Pool_update>, Pool_update>();
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private readonly ChangeableDictionary<XenRef<Pool>, Pool> _pool = new ChangeableDictionary<XenRef<Pool>, Pool>();
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private readonly ChangeableDictionary<XenRef<PUSB>, PUSB> _pusb = new ChangeableDictionary<XenRef<PUSB>, PUSB>();
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private readonly ChangeableDictionary<XenRef<PVS_cache_storage>, PVS_cache_storage> _pvs_cache_storage = new ChangeableDictionary<XenRef<PVS_cache_storage>, PVS_cache_storage>();
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private readonly ChangeableDictionary<XenRef<PVS_proxy>, PVS_proxy> _pvs_proxy = new ChangeableDictionary<XenRef<PVS_proxy>, PVS_proxy>();
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private readonly ChangeableDictionary<XenRef<PVS_server>, PVS_server> _pvs_server = new ChangeableDictionary<XenRef<PVS_server>, PVS_server>();
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private readonly ChangeableDictionary<XenRef<PVS_site>, PVS_site> _pvs_site = new ChangeableDictionary<XenRef<PVS_site>, PVS_site>();
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private readonly ChangeableDictionary<XenRef<Repository>, Repository> _repositories = new ChangeableDictionary<XenRef<Repository>, Repository>();
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private readonly ChangeableDictionary<XenRef<Role>, Role> _role = new ChangeableDictionary<XenRef<Role>, Role>();
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private readonly ChangeableDictionary<XenRef<SM>, SM> _sm = new ChangeableDictionary<XenRef<SM>, SM>();
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private readonly ChangeableDictionary<XenRef<SR>, SR> _sr = new ChangeableDictionary<XenRef<SR>, SR>();
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private readonly ChangeableDictionary<XenRef<Subject>, Subject> _subject = new ChangeableDictionary<XenRef<Subject>, Subject>();
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private readonly ChangeableDictionary<XenRef<Task>, Task> _task = new ChangeableDictionary<XenRef<Task>, Task>();
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private readonly ChangeableDictionary<XenRef<Tunnel>, Tunnel> _tunnel = new ChangeableDictionary<XenRef<Tunnel>, Tunnel>();
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private readonly ChangeableDictionary<XenRef<USB_group>, USB_group> _usb_group = new ChangeableDictionary<XenRef<USB_group>, USB_group>();
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private readonly ChangeableDictionary<XenRef<VBD_metrics>, VBD_metrics> _vbd_metrics = new ChangeableDictionary<XenRef<VBD_metrics>, VBD_metrics>();
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private readonly ChangeableDictionary<XenRef<VBD>, VBD> _vbd = new ChangeableDictionary<XenRef<VBD>, VBD>();
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private readonly ChangeableDictionary<XenRef<VDI>, VDI> _vdi = new ChangeableDictionary<XenRef<VDI>, VDI>();
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private readonly ChangeableDictionary<XenRef<VGPU_type>, VGPU_type> _vgpu_types = new ChangeableDictionary<XenRef<VGPU_type>, VGPU_type>();
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private readonly ChangeableDictionary<XenRef<VGPU>, VGPU> _vgpu = new ChangeableDictionary<XenRef<VGPU>, VGPU>();
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private readonly ChangeableDictionary<XenRef<VIF_metrics>, VIF_metrics> _vif_metrics = new ChangeableDictionary<XenRef<VIF_metrics>, VIF_metrics>();
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private readonly ChangeableDictionary<XenRef<VIF>, VIF> _vif = new ChangeableDictionary<XenRef<VIF>, VIF>();
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private readonly ChangeableDictionary<XenRef<VLAN>, VLAN> _vlan = new ChangeableDictionary<XenRef<VLAN>, VLAN>();
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private readonly ChangeableDictionary<XenRef<VM_appliance>, VM_appliance> _vm_appliance = new ChangeableDictionary<XenRef<VM_appliance>, VM_appliance>();
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private readonly ChangeableDictionary<XenRef<VM_guest_metrics>, VM_guest_metrics> _vm_guest_metrics = new ChangeableDictionary<XenRef<VM_guest_metrics>, VM_guest_metrics>();
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private readonly ChangeableDictionary<XenRef<VM_metrics>, VM_metrics> _vm_metrics = new ChangeableDictionary<XenRef<VM_metrics>, VM_metrics>();
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private readonly ChangeableDictionary<XenRef<VM>, VM> _vm = new ChangeableDictionary<XenRef<VM>, VM>();
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private readonly ChangeableDictionary<XenRef<VMSS>, VMSS> _vmss = new ChangeableDictionary<XenRef<VMSS>, VMSS>();
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private readonly ChangeableDictionary<XenRef<VTPM>, VTPM> _vtpms = new ChangeableDictionary<XenRef<VTPM>, VTPM>();
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private readonly ChangeableDictionary<XenRef<VUSB>, VUSB> _vusb = new ChangeableDictionary<XenRef<VUSB>, VUSB>();
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#pragma warning restore 0414
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private bool foldersChanged;
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private bool dockerContainersChanged;
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private readonly Dictionary<Type, IDictionary> dictionaries = new Dictionary<Type, IDictionary>();
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public Cache()
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{
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foreach (FieldInfo f in GetType().GetFields(BindingFlags.DeclaredOnly | BindingFlags.Instance | BindingFlags.NonPublic))
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{
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if (f.FieldType.Name.StartsWith("ChangeableDictionary"))
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{
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dictionaries.Add(f.FieldType.GetGenericArguments()[0].GetGenericArguments()[0],
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(IDictionary)f.GetValue(this));
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}
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}
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}
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#region Properties
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public Bond[] Bonds => contents(_bond);
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public Certificate[] Certificates => contents(_certificates);
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public Cluster[] Clusters => contents(_cluster);
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public Cluster_host[] Cluster_hosts => contents(_cluster_host);
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public DockerContainer[] DockerContainers => contents(_dockerContainers);
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public Feature[] Features => contents(_feature);
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public Folder[] Folders => contents(_folders);
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public GPU_group[] GPU_groups => contents(_gpu_groups);
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public Host[] Hosts => contents(_host);
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public Host_cpu[] Host_cpus => contents(_host_cpu);
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public int HostCount => _host.Count;
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public Message[] Messages => contents(_message);
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public XenAPI.Network[] Networks => contents(_network);
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public Network_sriov[] Network_sriov => contents(_network_sriov);
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public PBD[] PBDs => contents(_pbd);
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public PCI[] PCIs => contents(_pcis);
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public PGPU[] PGPUs => contents(_pgpu);
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public PIF[] PIFs => contents(_pif);
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public Pool[] Pools => contents(_pool);
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public Pool_patch[] Pool_patches => contents(_pool_patch);
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public Pool_update[] Pool_updates => contents(_pool_update);
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public PUSB[] PUSBs => contents(_pusb);
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public PVS_cache_storage[] PVS_cache_storages => contents(_pvs_cache_storage);
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public PVS_proxy[] PVS_proxies => contents(_pvs_proxy);
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public PVS_server[] PVS_servers => contents(_pvs_server);
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public PVS_site[] PVS_sites => contents(_pvs_site);
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public Repository[] Repositories => contents(_repositories);
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public Role[] Roles => contents(_role);
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public SM[] SMs => contents(_sm);
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public SR[] SRs => contents(_sr);
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public Subject[] Subjects => contents(_subject);
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public Tunnel[] Tunnels => contents(_tunnel);
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public USB_group[] USB_groups => contents(_usb_group);
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public VBD[] VBDs => contents(_vbd);
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public VDI[] VDIs => contents(_vdi);
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public VGPU[] VGPUs => contents(_vgpu);
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public VGPU_type[] VGPU_types => contents(_vgpu_types);
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public VIF[] VIFs => contents(_vif);
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public VM[] VMs => contents(_vm);
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public VM_appliance[] VM_appliances => contents(_vm_appliance);
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public VMSS[] VMSSs => contents(_vmss);
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public VTPM[] VTPMs => contents(_vtpms);
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public VUSB[] VUSBs => contents(_vusb);
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#endregion
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private static T[] contents<T>(ChangeableDictionary<XenRef<T>, T> d) where T : XenObject<T>
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{
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lock (d)
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{
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T[] result = new T[d.Values.Count];
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int i = 0;
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foreach (T o in d.Values)
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{
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result[i] = o;
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i++;
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}
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return result;
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}
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}
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/// <summary>
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/// Returns the collection for the given type, or null if no such dictionary is present.
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/// </summary>
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private IDictionary GetCollectionForType(Type t)
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{
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return dictionaries.ContainsKey(t) ? dictionaries[t] : null;
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}
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public void DeregisterCollectionChanged<T>(CollectionChangeEventHandler h) where T : XenObject<T>
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{
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ChangeableDictionary<XenRef<T>, T> d = GetCollectionForType(typeof(T)) as ChangeableDictionary<XenRef<T>, T>;
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if (d == null)
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return;
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d.CollectionChanged -= h;
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}
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public void RegisterCollectionChanged<T>(CollectionChangeEventHandler h) where T : XenObject<T>
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{
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ChangeableDictionary<XenRef<T>, T> d = GetCollectionForType(typeof(T)) as ChangeableDictionary<XenRef<T>, T>;
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if (d == null)
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return;
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d.CollectionChanged -= h;
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d.CollectionChanged += h;
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}
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public void DeregisterBatchCollectionChanged<T>(EventHandler h) where T : XenObject<T>
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{
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ChangeableDictionary<XenRef<T>, T> d = GetCollectionForType(typeof(T)) as ChangeableDictionary<XenRef<T>, T>;
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if (d == null)
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return;
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d.BatchCollectionChanged -= h;
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}
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public void RegisterBatchCollectionChanged<T>(EventHandler h) where T : XenObject<T>
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{
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ChangeableDictionary<XenRef<T>, T> d = GetCollectionForType(typeof(T)) as ChangeableDictionary<XenRef<T>, T>;
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if (d == null)
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return;
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d.BatchCollectionChanged -= h;
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d.BatchCollectionChanged += h;
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}
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public void AddAll<T>(List<T> l, Predicate<T> p) where T : XenObject<T>
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{
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IDictionary d = GetCollectionForType(typeof(T));
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if (d == null)
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return;
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lock (d)
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{
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if (p == null)
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foreach (T value in d.Values)
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l.Add(value);
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else
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foreach (T value in d.Values)
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if (p(value))
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l.Add(value);
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}
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}
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private static MethodInfo ClearMethod = typeof(Cache).GetMethod("Clear_", BindingFlags.NonPublic | BindingFlags.Instance);
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public void Clear()
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{
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foreach (IDictionary d in dictionaries.Values)
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{
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lock (d)
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{
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object[] args = { d };
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ClearMethod.MakeGenericMethod(APIType(d)).Invoke(this, args);
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}
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INotifyCollectionChanged d1 = d as INotifyCollectionChanged;
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if (d1 != null)
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d1.OnBatchCollectionChanged();
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}
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}
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private static MethodInfo UpdateFromMethod = typeof(Cache).GetMethod("UpdateFrom_", BindingFlags.NonPublic | BindingFlags.Instance);
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/// <returns>true if some changes have been made. This is used to indicate that XenObjectsUpdated should be fired by IXenConnection.</returns>
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public bool UpdateFrom(IXenConnection connection, IList<ObjectChange> changes)
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{
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Dictionary<IDictionary, object> tofire = new Dictionary<IDictionary, object>();
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foreach (ObjectChange o in changes)
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{
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if (IgnoreObjectChange(o))
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continue;
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IDictionary d = GetCollectionForType(o.type);
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if (d == null)
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continue;
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object[] args = { connection, d, o };
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UpdateFromMethod.MakeGenericMethod(o.type).Invoke(this, args);
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tofire[d] = null;
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}
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bool result = false;
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foreach (IDictionary d in tofire.Keys)
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{
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INotifyCollectionChanged n = d as INotifyCollectionChanged;
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if (n != null)
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n.OnBatchCollectionChanged();
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result = true;
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}
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return result;
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}
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/// <summary>
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/// For performance reasons, we ignore some events. These are:
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/// 1. The heartbeat event from xapi, which is a "change" on the pool object, but where the object doesn't actually change.
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/// 2. Tasks that are frequent and which we don't care about, like SR.scan.
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/// 3. Changes on SR that only toggle current_operations. These happen at the same time as the
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/// periodic SR.scan.
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/// </summary>
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private bool IgnoreObjectChange(ObjectChange obj)
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{
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if (obj.value == null)
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{
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// Object is being deleted. Never ignore these!
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return false;
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}
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else if (obj.type == typeof(Task))
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{
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Task task = (Task)obj.value;
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return task.IgnoreInCacheUpdate();
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}
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else if (obj.type == typeof(Pool))
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{
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Pool newPool = (Pool)obj.value;
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Pool oldPool = Resolve(new XenRef<Pool>(obj.xenref));
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return oldPool != null && newPool.DeepEquals(oldPool, false); //We do want to see changes in the Pool.current_operations.
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}
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else if (obj.type == typeof(SR))
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{
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SR newSR = (SR)obj.value;
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SR oldSR = Resolve(new XenRef<SR>(obj.xenref));
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return oldSR != null && newSR.DeepEquals(oldSR, true);
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}
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else
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{
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return false;
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}
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}
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public T Find_By_Uuid<T>(string uuid) where T : XenObject<T>
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{
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Type t = typeof(T);
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PropertyInfo p = t.GetProperty("uuid", BindingFlags.Public | BindingFlags.Instance);
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if (p == null)
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return null;
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ChangeableDictionary<XenRef<T>, T> d = GetCollectionForType(t) as ChangeableDictionary<XenRef<T>, T>;
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if (d == null)
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return null;
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lock (d)
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{
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foreach (T m in d.Values)
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{
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if (string.Equals((string)p.GetValue(m, null), uuid, StringComparison.OrdinalIgnoreCase))
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return m;
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}
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}
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return null;
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}
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/// <summary>
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/// Find a XenRef corresponding to the given XenObject, using its UUID.
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/// Returns null if no such object is found.
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/// </summary>
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public XenRef<T> FindRef<T>(T needle) where T : XenObject<T>
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{
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Type t = typeof(T);
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PropertyInfo p = t.GetProperty("uuid", BindingFlags.Public | BindingFlags.Instance);
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if (p == null)
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return null;
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string uuid = (string)p.GetValue(needle, null);
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ChangeableDictionary<XenRef<T>, T> d = GetCollectionForType(t) as ChangeableDictionary<XenRef<T>, T>;
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if (d == null)
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return null;
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lock (d)
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{
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foreach (KeyValuePair<XenRef<T>, T> kvp in d)
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{
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if (string.Equals((string)p.GetValue(kvp.Value, null), uuid, StringComparison.OrdinalIgnoreCase))
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return kvp.Key;
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}
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}
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return null;
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}
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public bool TryResolve<T>(XenRef<T> xenRef, out T result) where T : XenObject<T>
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{
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result = Resolve(xenRef);
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return result != null;
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}
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/// <summary>
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///
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/// </summary>
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/// <typeparam name="T"></typeparam>
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/// <param name="xenRef">May be null, in which case null is returned. May not be a null ref.</param>
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/// <returns></returns>
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public T Resolve<T>(XenRef<T> xenRef) where T : XenObject<T>
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{
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if (xenRef == null)
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return null;
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ChangeableDictionary<XenRef<T>, T> d = GetCollectionForType(typeof(T)) as ChangeableDictionary<XenRef<T>, T>;
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if (d == null)
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return null;
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T result;
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return d.TryGetValue(xenRef, out result) ? result : null;
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}
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private void Clear_<T>(ChangeableDictionary<XenRef<T>, T> o) where T : XenObject<T>
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{
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// explicitly remove each element so change events are fired
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XenRef<T>[] keys = new XenRef<T>[o.Keys.Count];
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o.Keys.CopyTo(keys, 0);
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foreach (XenRef<T> key in keys)
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{
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lock (o)
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{
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o.Remove(key);
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}
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}
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}
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private void UpdateFrom_<T>(Network.IXenConnection connection, ChangeableDictionary<XenRef<T>, T> target, ObjectChange source) where T : XenObject<T>, new()
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{
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XenRef<T> xenref = source.xenref as XenRef<T>;
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if (xenref == null)
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{
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xenref = new XenRef<T>((string)source.xenref);
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}
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if (source.value != null)
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{
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T to_update = null;
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lock (target)
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{
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if (!target.TryGetValue(xenref, out to_update))
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{
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// add
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T obj = new T();
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obj.Connection = connection;
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obj.UpdateFrom((T)source.value);
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obj.opaque_ref = xenref.opaque_ref;
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target.Add(xenref, obj);
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}
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}
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// Update the object that we found above. Note that this needs to be done out of the
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// scope of the lock(target), as UpdateFrom is going to fire events.
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if (to_update != null)
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to_update.UpdateFrom((T)source.value);
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}
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else
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{
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// delete the source object from our model
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lock (target)
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{
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target.Remove(xenref);
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}
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}
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}
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private Type APIType(IDictionary d)
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{
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return d.GetType().GetGenericArguments()[1];
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}
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public void AddFolder(XenRef<Folder> path, Folder folder)
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{
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_folders[path] = folder;
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foldersChanged = true;
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}
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public void RemoveFolder(XenRef<Folder> path)
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{
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lock (_folders)
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{
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_folders.Remove(path);
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}
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foldersChanged = true;
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}
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public void CheckFoldersBatchChange()
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{
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if (foldersChanged)
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{
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foldersChanged = false;
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_folders.OnBatchCollectionChanged();
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}
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}
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public void CheckDockerContainersBatchChange()
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{
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if (dockerContainersChanged)
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{
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dockerContainersChanged = false;
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_dockerContainers.OnBatchCollectionChanged();
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}
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}
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public void UpdateDockerContainersForVM(IList<DockerContainer> containers, VM vm)
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{
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Trace.Assert(vm != null);
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//updating existing, adding new containers
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dockerContainersChanged = dockerContainersChanged || containers.Count > 0;
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foreach (var c in containers)
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{
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_dockerContainers[new XenRef<DockerContainer>(c)] = c;
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}
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List<KeyValuePair<XenRef<DockerContainer>, DockerContainer>> containersGoneFromThisVM = null;
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//removing the ones that are not there anymore on this VM
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lock (_dockerContainers)
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{
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containersGoneFromThisVM = _dockerContainers.Where(c => c.Value != null && c.Value.Parent.uuid == vm.uuid && !containers.Any(cont => cont.uuid == c.Value.uuid)).ToList();
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dockerContainersChanged = dockerContainersChanged || containersGoneFromThisVM.Count > 0;
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foreach (var c in containersGoneFromThisVM)
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{
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_dockerContainers.Remove(new XenRef<DockerContainer>(c.Value));
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}
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}
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}
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public IEnumerable<IXenObject> XenSearchableObjects
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{
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get
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{
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foreach (IXenObject o in VMs)
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yield return o;
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foreach (IXenObject o in VM_appliances)
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yield return o;
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foreach (IXenObject o in Hosts)
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yield return o;
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foreach (IXenObject o in SRs)
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yield return o;
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foreach (IXenObject o in Networks)
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yield return o;
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foreach (IXenObject o in VDIs)
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yield return o;
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foreach (IXenObject o in Folders)
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yield return o;
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foreach (IXenObject o in DockerContainers)
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yield return o;
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foreach (Pool pool in Pools)
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{
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if (pool != null && pool.IsVisible())
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{
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yield return pool;
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break;
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}
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}
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}
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}
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}
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}
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