CLOUDSTACK-3568: Refactore CloudStack/vCenter API session management facility 
to avoid the situation that multiple API requests are sharing with the same 
vCenter API session


Project: http://git-wip-us.apache.org/repos/asf/cloudstack/repo
Commit: http://git-wip-us.apache.org/repos/asf/cloudstack/commit/0becde90
Tree: http://git-wip-us.apache.org/repos/asf/cloudstack/tree/0becde90
Diff: http://git-wip-us.apache.org/repos/asf/cloudstack/diff/0becde90

Branch: refs/heads/master
Commit: 0becde90bb082e469591c8aec1a42c885902eb67
Parents: c6dfb33
Author: Kelven Yang <[email protected]>
Authored: Mon Aug 12 16:24:39 2013 -0700
Committer: Kelven Yang <[email protected]>
Committed: Wed Sep 4 14:49:45 2013 -0700

----------------------------------------------------------------------
 .../vmware/resource/VmwareContextFactory.java   |  24 ++-
 .../vmware/resource/VmwareResource.java         | 104 ++++++-------
 .../VmwareSecondaryStorageContextFactory.java   |  52 +++----
 .../VmwareSecondaryStorageResourceHandler.java  | 110 ++++++++------
 .../com/cloud/hypervisor/vmware/mo/HostMO.java  |  23 +++
 .../hypervisor/vmware/util/VmwareContext.java   |  44 ++++--
 .../vmware/util/VmwareContextPool.java          | 148 +++++++++++++++++++
 7 files changed, 354 insertions(+), 151 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/cloudstack/blob/0becde90/plugins/hypervisors/vmware/src/com/cloud/hypervisor/vmware/resource/VmwareContextFactory.java
----------------------------------------------------------------------
diff --git 
a/plugins/hypervisors/vmware/src/com/cloud/hypervisor/vmware/resource/VmwareContextFactory.java
 
b/plugins/hypervisors/vmware/src/com/cloud/hypervisor/vmware/resource/VmwareContextFactory.java
index 5db9da3..a647560 100755
--- 
a/plugins/hypervisors/vmware/src/com/cloud/hypervisor/vmware/resource/VmwareContextFactory.java
+++ 
b/plugins/hypervisors/vmware/src/com/cloud/hypervisor/vmware/resource/VmwareContextFactory.java
@@ -25,22 +25,23 @@ import org.springframework.stereotype.Component;
 import com.cloud.hypervisor.vmware.manager.VmwareManager;
 import com.cloud.hypervisor.vmware.util.VmwareClient;
 import com.cloud.hypervisor.vmware.util.VmwareContext;
+import com.cloud.hypervisor.vmware.util.VmwareContextPool;
 import com.cloud.utils.StringUtils;
 
 @Component
 public class VmwareContextFactory {
-
     private static final Logger s_logger = 
Logger.getLogger(VmwareContextFactory.class);
 
        private static volatile int s_seq = 1;
        private static VmwareManager s_vmwareMgr;
+       private static VmwareContextPool s_pool;
 
        @Inject VmwareManager _vmwareMgr;
 
        static {
                // skip certificate check
                System.setProperty("axis.socketSecureFactory", 
"org.apache.axis.components.net.SunFakeTrustSocketFactory");
-               //s_vmwareMgr = 
ComponentContext.inject(VmwareManagerImpl.class);
+               s_pool = new VmwareContextPool();
        }
 
        @PostConstruct
@@ -54,8 +55,6 @@ public class VmwareContextFactory {
                assert(vCenterPassword != null);
 
                String serviceUrl = "https://"; + vCenterAddress + 
"/sdk/vimService";
-               //String[] params = new String[] {"--url", serviceUrl, 
"--username", vCenterUserName, "--password", vCenterPassword };
-
                if(s_logger.isDebugEnabled())
                        s_logger.debug("initialize VmwareContext. url: " + 
serviceUrl + ", username: " + vCenterUserName + ", password: " + 
StringUtils.getMaskedPasswordForDisplay(vCenterPassword));
 
@@ -70,4 +69,21 @@ public class VmwareContextFactory {
 
                return context;
        }
+       
+       public static VmwareContext getContext(String vCenterAddress, String 
vCenterUserName, String vCenterPassword) throws Exception {
+               VmwareContext context = s_pool.getContext(vCenterAddress, 
vCenterUserName);
+               if(context == null)
+                       context = create(vCenterAddress, vCenterUserName, 
vCenterPassword);
+               
+               if(context != null) {
+                       context.setPoolInfo(s_pool, 
VmwareContextPool.composePoolKey(vCenterAddress, vCenterUserName));
+                       
+                       
context.registerStockObject(VmwareManager.CONTEXT_STOCK_NAME, s_vmwareMgr);
+
+                       context.registerStockObject("serviceconsole", 
s_vmwareMgr.getServiceConsolePortGroupName());
+                       context.registerStockObject("manageportgroup", 
s_vmwareMgr.getManagementPortGroupName());
+               }
+               
+               return context;
+       }
 }

http://git-wip-us.apache.org/repos/asf/cloudstack/blob/0becde90/plugins/hypervisors/vmware/src/com/cloud/hypervisor/vmware/resource/VmwareResource.java
----------------------------------------------------------------------
diff --git 
a/plugins/hypervisors/vmware/src/com/cloud/hypervisor/vmware/resource/VmwareResource.java
 
b/plugins/hypervisors/vmware/src/com/cloud/hypervisor/vmware/resource/VmwareResource.java
index 70b5bf0..d0173d6 100755
--- 
a/plugins/hypervisors/vmware/src/com/cloud/hypervisor/vmware/resource/VmwareResource.java
+++ 
b/plugins/hypervisors/vmware/src/com/cloud/hypervisor/vmware/resource/VmwareResource.java
@@ -374,7 +374,7 @@ public class VmwareResource implements StoragePoolResource, 
ServerResource, Vmwa
     protected DiskControllerType _rootDiskController = DiskControllerType.ide;
 
     protected ManagedObjectReference _morHyperHost;
-    protected VmwareContext _serviceContext;
+    protected ThreadLocal<VmwareContext> _serviceContext = new 
ThreadLocal<VmwareContext>();
     protected String _hostName;
 
     protected HashMap<String, State> _vms = new HashMap<String, State>(71);
@@ -602,10 +602,10 @@ public class VmwareResource implements 
StoragePoolResource, ServerResource, Vmwa
             }
 
         } finally {
+               recycleServiceContext();
             NDC.pop();
         }
 
-
         if(s_logger.isTraceEnabled())
             s_logger.trace("End executeRequest(), cmd: " + 
cmd.getClass().getSimpleName());
 
@@ -3324,7 +3324,7 @@ public class VmwareResource implements 
StoragePoolResource, ServerResource, Vmwa
         }
     }
 
-    protected synchronized Answer execute(final RemoteAccessVpnCfgCommand cmd) 
{
+    protected Answer execute(final RemoteAccessVpnCfgCommand cmd) {
         String controlIp = getRouterSshControlIp(cmd);
         StringBuffer argsBuf = new StringBuffer();
         if (cmd.isCreate()) {
@@ -3368,7 +3368,7 @@ public class VmwareResource implements 
StoragePoolResource, ServerResource, Vmwa
         return new Answer(cmd);
     }
 
-    protected synchronized Answer execute(final VpnUsersCfgCommand cmd) {
+    protected Answer execute(final VpnUsersCfgCommand cmd) {
         VmwareManager mgr = 
getServiceContext().getStockObject(VmwareManager.CONTEXT_STOCK_NAME);
 
         String controlIp = getRouterSshControlIp(cmd);
@@ -5363,7 +5363,7 @@ public class VmwareResource implements 
StoragePoolResource, ServerResource, Vmwa
 
 
     @Override
-    public synchronized CreateAnswer execute(CreateCommand cmd) {
+    public CreateAnswer execute(CreateCommand cmd) {
         if (s_logger.isInfoEnabled()) {
             s_logger.info("Executing resource CreateCommand: " + 
_gson.toJson(cmd));
         }
@@ -5397,12 +5397,11 @@ public class VmwareResource implements 
StoragePoolResource, ServerResource, Vmwa
                         }
 
                         String volumeDatastorePath = String.format("[%s] 
%s.vmdk", dsMo.getName(), vmdkName);
-                        synchronized (this) {
-                            s_logger.info("Delete file if exists in datastore 
to clear the way for creating the volume. file: " + volumeDatastorePath);
-                            
VmwareStorageLayoutHelper.deleteVolumeVmdkFiles(dsMo, vmdkName, dcMo);
-                            vmMo.createDisk(volumeDatastorePath, 
getMBsFromBytes(dskch.getSize()), morDatastore, -1);
-                            vmMo.detachDisk(volumeDatastorePath, false);
-                        }
+
+                        s_logger.info("Delete file if exists in datastore to 
clear the way for creating the volume. file: " + volumeDatastorePath);
+                        VmwareStorageLayoutHelper.deleteVolumeVmdkFiles(dsMo, 
vmdkName, dcMo);
+                        vmMo.createDisk(volumeDatastorePath, 
getMBsFromBytes(dskch.getSize()), morDatastore, -1);
+                        vmMo.detachDisk(volumeDatastorePath, false);
 
                         VolumeTO vol = new VolumeTO(cmd.getVolumeId(), 
dskch.getType(), pool.getType(), pool.getUuid(), dskch.getName(), 
pool.getPath(), vmdkName, dskch.getSize(), null);
                         return new CreateAnswer(cmd, vol);
@@ -5454,13 +5453,11 @@ public class VmwareResource implements 
StoragePoolResource, ServerResource, Vmwa
                         throw new Exception("Unable to create a dummy VM for 
volume creation");
                     }
 
-                    synchronized (this) {
-                        // s_logger.info("Delete file if exists in datastore 
to clear the way for creating the volume. file: " + volumeDatastorePath);
-                        VmwareStorageLayoutHelper.deleteVolumeVmdkFiles(dsMo, 
volumeUuid.toString(), dcMo);
+                    // s_logger.info("Delete file if exists in datastore to 
clear the way for creating the volume. file: " + volumeDatastorePath);
+                    VmwareStorageLayoutHelper.deleteVolumeVmdkFiles(dsMo, 
volumeUuid.toString(), dcMo);
 
-                        vmMo.createDisk(volumeDatastorePath, 
getMBsFromBytes(dskch.getSize()), morDatastore, 
vmMo.getScsiDeviceControllerKey());
-                        vmMo.detachDisk(volumeDatastorePath, false);
-                    }
+                    vmMo.createDisk(volumeDatastorePath, 
getMBsFromBytes(dskch.getSize()), morDatastore, 
vmMo.getScsiDeviceControllerKey());
+                    vmMo.detachDisk(volumeDatastorePath, false);
 
                     VolumeTO vol = new VolumeTO(cmd.getVolumeId(), 
dskch.getType(), pool.getType(), pool.getUuid(), dskch.getName(), 
pool.getPath(), volumeUuid, dskch.getSize(), null);
                     return new CreateAnswer(cmd, vol);
@@ -5627,6 +5624,8 @@ public class VmwareResource implements 
StoragePoolResource, ServerResource, Vmwa
                 s_logger.info("Host " + hyperHost.getHyperHostName() + " is 
not in connected state");
                 return null;
             }
+            
+            ((HostMO)hyperHost).enableVncOnHostFirewall();
 
             AboutInfo aboutInfo = ((HostMO)hyperHost).getHostAboutInfo();
             hostApiVersion = aboutInfo.getApiVersion();
@@ -6451,48 +6450,40 @@ public class VmwareResource implements 
StoragePoolResource, ServerResource, Vmwa
     }
 
     @Override
-    public synchronized VmwareContext getServiceContext(Command cmd) {
-        if (_serviceContext == null) {
-            try {
-                _serviceContext = VmwareContextFactory.create(_vCenterAddress, 
_username, _password);
-                VmwareHypervisorHost hyperHost = getHyperHost(_serviceContext, 
cmd);
-                assert(hyperHost instanceof HostMO);
-
-                HostFirewallSystemMO firewallMo = 
((HostMO)hyperHost).getHostFirewallSystemMO();
-                boolean bRefresh = false;
-                if(firewallMo != null) {
-                    HostFirewallInfo firewallInfo = 
firewallMo.getFirewallInfo();
-                    if(firewallInfo != null && firewallInfo.getRuleset() != 
null) {
-                        for(HostFirewallRuleset rule : 
firewallInfo.getRuleset()) {
-                            if("vncServer".equalsIgnoreCase(rule.getKey())) {
-                                bRefresh = true;
-                                firewallMo.enableRuleset("vncServer");
-                            } else 
if("gdbserver".equalsIgnoreCase(rule.getKey())) {
-                                bRefresh = true;
-                                firewallMo.enableRuleset("gdbserver");
-                            }
-                        }
-                    }
-
-                    if(bRefresh)
-                        firewallMo.refreshFirewall();
-                }
-            } catch (Exception e) {
-                s_logger.error("Unable to connect to vSphere server: " + 
_vCenterAddress, e);
-                throw new CloudRuntimeException("Unable to connect to vSphere 
server: " + _vCenterAddress);
-            }
+    public VmwareContext getServiceContext(Command cmd) {
+       if(_serviceContext.get() != null)
+               return _serviceContext.get();
+       
+       VmwareContext context = null;
+        try {
+            context = VmwareContextFactory.getContext(_vCenterAddress, 
_username, _password);
+            _serviceContext.set(context);
+        } catch (Exception e) {
+            s_logger.error("Unable to connect to vSphere server: " + 
_vCenterAddress, e);
+            throw new CloudRuntimeException("Unable to connect to vSphere 
server: " + _vCenterAddress);
         }
-        return _serviceContext;
+        return context;
     }
 
     @Override
-    public synchronized void invalidateServiceContext(VmwareContext context) {
-        if (_serviceContext != null) {
-            _serviceContext.close();
-        }
-        _serviceContext = null;
-    }
-
+    public void invalidateServiceContext(VmwareContext context) {
+       assert(_serviceContext.get() == context);
+       
+       _serviceContext.set(null);
+       if(context != null)
+               context.close();
+    }
+
+       private void recycleServiceContext() {
+               VmwareContext context = _serviceContext.get();
+               _serviceContext.set(null);
+               
+               if(context != null) {
+                       assert(context.getPool() != null);
+                       context.getPool().returnContext(context);
+               }
+       }
+    
     @Override
     public VmwareHypervisorHost getHyperHost(VmwareContext context, Command 
cmd) {
         if (_morHyperHost.getType().equalsIgnoreCase("HostSystem")) {
@@ -6517,7 +6508,6 @@ public class VmwareResource implements 
StoragePoolResource, ServerResource, Vmwa
     @Override
     public void setName(String name) {
         // TODO Auto-generated method stub
-
     }
 
     @Override
@@ -6541,7 +6531,6 @@ public class VmwareResource implements 
StoragePoolResource, ServerResource, Vmwa
     @Override
     public void setRunLevel(int level) {
         // TODO Auto-generated method stub
-
     }
 
     @Override
@@ -6590,6 +6579,7 @@ public class VmwareResource implements 
StoragePoolResource, ServerResource, Vmwa
             return new Answer(cmd, false, msg);
         }
     }
+    
     private boolean isVMWareToolsInstalled(VirtualMachineMO vmMo) throws 
Exception{
         GuestInfo guestInfo = vmMo.getVmGuestInfo();
         return (guestInfo != null && guestInfo.getGuestState() != null && 
guestInfo.getGuestState().equalsIgnoreCase("running"));

http://git-wip-us.apache.org/repos/asf/cloudstack/blob/0becde90/plugins/hypervisors/vmware/src/com/cloud/storage/resource/VmwareSecondaryStorageContextFactory.java
----------------------------------------------------------------------
diff --git 
a/plugins/hypervisors/vmware/src/com/cloud/storage/resource/VmwareSecondaryStorageContextFactory.java
 
b/plugins/hypervisors/vmware/src/com/cloud/storage/resource/VmwareSecondaryStorageContextFactory.java
index 646ef63..5032c98 100644
--- 
a/plugins/hypervisors/vmware/src/com/cloud/storage/resource/VmwareSecondaryStorageContextFactory.java
+++ 
b/plugins/hypervisors/vmware/src/com/cloud/storage/resource/VmwareSecondaryStorageContextFactory.java
@@ -22,14 +22,16 @@ import java.util.Map;
 
 import com.cloud.hypervisor.vmware.util.VmwareClient;
 import com.cloud.hypervisor.vmware.util.VmwareContext;
+import com.cloud.hypervisor.vmware.util.VmwareContextPool;
 
 public class VmwareSecondaryStorageContextFactory {
        private static volatile int s_seq = 1;
 
-       private static Map<String, VmwareContext> s_contextMap = new 
HashMap<String, VmwareContext>();
+       private static VmwareContextPool s_pool;
 
        public static void initFactoryEnvironment() {
                System.setProperty("axis.socketSecureFactory", 
"org.apache.axis.components.net.SunFakeTrustSocketFactory");
+               s_pool = new VmwareContextPool();
        }
 
        public static VmwareContext create(String vCenterAddress, String 
vCenterUserName, String vCenterPassword) throws Exception {
@@ -37,37 +39,31 @@ public class VmwareSecondaryStorageContextFactory {
                assert(vCenterUserName != null);
                assert(vCenterPassword != null);
 
-               VmwareContext context = null;
-
-               synchronized(s_contextMap) {
-                       context = s_contextMap.get(vCenterAddress);
-                       if(context == null) {
-                               String serviceUrl = "https://"; + vCenterAddress 
+ "/sdk/vimService";
-                               //String[] params = new String[] {"--url", 
serviceUrl, "--username", vCenterUserName, "--password", vCenterPassword };
-                               VmwareClient vimClient = new 
VmwareClient(vCenterAddress + "-" + s_seq++);
-                               vimClient.connect(serviceUrl, vCenterUserName, 
vCenterPassword);
-                               context = new VmwareContext(vimClient, 
vCenterAddress);
-                               context.registerStockObject("username", 
vCenterUserName);
-                               context.registerStockObject("password", 
vCenterPassword);
-
-                               s_contextMap.put(vCenterAddress, context);
-                       }
-               }
-
+               String serviceUrl = "https://"; + vCenterAddress + 
"/sdk/vimService";
+               VmwareClient vimClient = new VmwareClient(vCenterAddress + "-" 
+ s_seq++);
+               vimClient.connect(serviceUrl, vCenterUserName, vCenterPassword);
+               VmwareContext context = new VmwareContext(vimClient, 
vCenterAddress);
                assert(context != null);
                return context;
        }
-
-       public static void invalidate(VmwareContext context) {
-               synchronized(s_contextMap) {
-            for(Iterator<Map.Entry<String, VmwareContext>> entryIter = 
s_contextMap.entrySet().iterator(); entryIter.hasNext();) {
-                Map.Entry<String, VmwareContext> entry = entryIter.next();
-                if(entry.getValue() == context) {
-                    entryIter.remove();
-                }
-                       }
+       
+       public static VmwareContext getContext(String vCenterAddress, String 
vCenterUserName, String vCenterPassword) throws Exception {
+               VmwareContext context = s_pool.getContext(vCenterAddress, 
vCenterUserName);
+               if(context == null) {
+                       context = create(vCenterAddress, vCenterUserName, 
vCenterPassword);
                }
-
+               
+               if(context != null) {
+                       context.setPoolInfo(s_pool, 
VmwareContextPool.composePoolKey(vCenterAddress, vCenterUserName));
+                       
+                       context.registerStockObject("username", 
vCenterUserName);
+                       context.registerStockObject("password", 
vCenterPassword);
+               }
+               
+               return context;
+       }
+       
+       public static void invalidate(VmwareContext context) {
                context.close();
        }
 }

http://git-wip-us.apache.org/repos/asf/cloudstack/blob/0becde90/plugins/hypervisors/vmware/src/com/cloud/storage/resource/VmwareSecondaryStorageResourceHandler.java
----------------------------------------------------------------------
diff --git 
a/plugins/hypervisors/vmware/src/com/cloud/storage/resource/VmwareSecondaryStorageResourceHandler.java
 
b/plugins/hypervisors/vmware/src/com/cloud/storage/resource/VmwareSecondaryStorageResourceHandler.java
index 5dc70e7..edfd94a 100644
--- 
a/plugins/hypervisors/vmware/src/com/cloud/storage/resource/VmwareSecondaryStorageResourceHandler.java
+++ 
b/plugins/hypervisors/vmware/src/com/cloud/storage/resource/VmwareSecondaryStorageResourceHandler.java
@@ -45,6 +45,7 @@ import com.cloud.hypervisor.vmware.util.VmwareContext;
 import com.cloud.hypervisor.vmware.util.VmwareHelper;
 import com.cloud.serializer.GsonHelper;
 import com.cloud.utils.Pair;
+import com.cloud.utils.StringUtils;
 import com.google.gson.Gson;
 import com.vmware.vim25.ManagedObjectReference;
 
@@ -57,6 +58,8 @@ public class VmwareSecondaryStorageResourceHandler implements 
SecondaryStorageRe
 
     private final Gson _gson;
     private final StorageSubsystemCommandHandler storageSubsystemHandler;
+    
+    private ThreadLocal<VmwareContext> currentContext = new 
ThreadLocal<VmwareContext>();
 
     /*
      * private Map<String, HostMO> _activeHosts = new HashMap<String, 
HostMO>();
@@ -73,47 +76,52 @@ public class VmwareSecondaryStorageResourceHandler 
implements SecondaryStorageRe
         vmwareStorageSubsystemCommandHandler.setStorageResource(_resource);
         vmwareStorageSubsystemCommandHandler.setStorageManager(_storageMgr);
         storageSubsystemHandler = vmwareStorageSubsystemCommandHandler;
-
     }
 
     @Override
     public Answer executeRequest(Command cmd) {
-        Answer answer;
-        if (cmd instanceof PrimaryStorageDownloadCommand) {
-            answer = execute((PrimaryStorageDownloadCommand) cmd);
-        } else if (cmd instanceof BackupSnapshotCommand) {
-            answer = execute((BackupSnapshotCommand) cmd);
-        } else if (cmd instanceof CreatePrivateTemplateFromVolumeCommand) {
-            answer = execute((CreatePrivateTemplateFromVolumeCommand) cmd);
-        } else if (cmd instanceof CreatePrivateTemplateFromSnapshotCommand) {
-            answer = execute((CreatePrivateTemplateFromSnapshotCommand) cmd);
-        } else if (cmd instanceof CopyVolumeCommand) {
-            answer = execute((CopyVolumeCommand) cmd);
-        } else if (cmd instanceof CreateVolumeFromSnapshotCommand) {
-            answer = execute((CreateVolumeFromSnapshotCommand) cmd);
-        } else if (cmd instanceof StorageSubSystemCommand) {
-            answer = 
storageSubsystemHandler.handleStorageCommands((StorageSubSystemCommand) cmd);
-        } else if (cmd instanceof CreateEntityDownloadURLCommand) {
-            answer = execute((CreateEntityDownloadURLCommand)cmd);
-        } else {
-            answer = _resource.defaultAction(cmd);
-        }
-
-        // special handling to pass-back context info for cleanups
-        if (cmd.getContextParam("execid") != null) {
-            answer.setContextParam("execid", cmd.getContextParam("execid"));
-        }
-
-        if (cmd.getContextParam("checkpoint") != null) {
-            answer.setContextParam("checkpoint", 
cmd.getContextParam("checkpoint"));
-        }
-
-        if (cmd.getContextParam("checkpoint2") != null) {
-            answer.setContextParam("checkpoint2", 
cmd.getContextParam("checkpoint2"));
-        }
-
-        return answer;
+       
+       try {
+               Answer answer;
+               if (cmd instanceof PrimaryStorageDownloadCommand) {
+                   answer = execute((PrimaryStorageDownloadCommand) cmd);
+               } else if (cmd instanceof BackupSnapshotCommand) {
+                   answer = execute((BackupSnapshotCommand) cmd);
+               } else if (cmd instanceof 
CreatePrivateTemplateFromVolumeCommand) {
+                   answer = execute((CreatePrivateTemplateFromVolumeCommand) 
cmd);
+               } else if (cmd instanceof 
CreatePrivateTemplateFromSnapshotCommand) {
+                   answer = execute((CreatePrivateTemplateFromSnapshotCommand) 
cmd);
+               } else if (cmd instanceof CopyVolumeCommand) {
+                   answer = execute((CopyVolumeCommand) cmd);
+               } else if (cmd instanceof CreateVolumeFromSnapshotCommand) {
+                   answer = execute((CreateVolumeFromSnapshotCommand) cmd);
+               } else if (cmd instanceof StorageSubSystemCommand) {
+                   answer = 
storageSubsystemHandler.handleStorageCommands((StorageSubSystemCommand) cmd);
+               } else if (cmd instanceof CreateEntityDownloadURLCommand) {
+                   answer = execute((CreateEntityDownloadURLCommand)cmd);
+               } else {
+                   answer = _resource.defaultAction(cmd);
+               }
+       
+               // special handling to pass-back context info for cleanups
+               if (cmd.getContextParam("execid") != null) {
+                   answer.setContextParam("execid", 
cmd.getContextParam("execid"));
+               }
+       
+               if (cmd.getContextParam("checkpoint") != null) {
+                   answer.setContextParam("checkpoint", 
cmd.getContextParam("checkpoint"));
+               }
+       
+               if (cmd.getContextParam("checkpoint2") != null) {
+                   answer.setContextParam("checkpoint2", 
cmd.getContextParam("checkpoint2"));
+               }
+       
+               return answer;
+       } finally {
+               recycleServiceContext();
+       }
     }
+    
     protected Answer execute(CreateEntityDownloadURLCommand cmd) {
         boolean result = _storageMgr.execute(this, cmd);
         return _resource.defaultAction(cmd);
@@ -199,30 +207,38 @@ public class VmwareSecondaryStorageResourceHandler 
implements SecondaryStorageRe
 
         try {
             _resource.ensureOutgoingRuleForAddress(vCenterAddress);
-            VmwareContext context = null;
-
-            // cached VmwareContext may be timed out in vCenter, give it a
-            // chance to reclaim a new context from factory
-            for (int i = 0; i < 2; i++) {
-                context = 
VmwareSecondaryStorageContextFactory.create(vCenterAddress, username, password);
-                if (!validateContext(context, cmd)) {
-                    invalidateServiceContext(context);
-                }
-            }
-
+            
+               VmwareContext context = currentContext.get();
+               if(context == null) {
+                       s_logger.info("Open new VmwareContext. vCenter: " + 
vCenterAddress + ", user: " + username 
+                               + ", password: " + 
StringUtils.getMaskedPasswordForDisplay(password));
+                context = 
VmwareSecondaryStorageContextFactory.getContext(vCenterAddress, username, 
password);
+               }
+               
             if (context != null) {
                 context.registerStockObject("serviceconsole", 
cmd.getContextParam("serviceconsole"));
                 context.registerStockObject("manageportgroup", 
cmd.getContextParam("manageportgroup"));
             }
+            currentContext.set(context);
             return context;
         } catch (Exception e) {
             s_logger.error("Unexpected exception " + e.toString(), e);
             return null;
         }
     }
+    
+    public void recycleServiceContext() {
+       if(currentContext.get() != null) {
+               VmwareContext context = currentContext.get();
+               currentContext.set(null);
+               assert(context.getPool() != null);
+               context.getPool().returnContext(context);
+       }
+    }
 
     @Override
     public void invalidateServiceContext(VmwareContext context) {
+       currentContext.set(null);
         VmwareSecondaryStorageContextFactory.invalidate(context);
     }
 

http://git-wip-us.apache.org/repos/asf/cloudstack/blob/0becde90/vmware-base/src/com/cloud/hypervisor/vmware/mo/HostMO.java
----------------------------------------------------------------------
diff --git a/vmware-base/src/com/cloud/hypervisor/vmware/mo/HostMO.java 
b/vmware-base/src/com/cloud/hypervisor/vmware/mo/HostMO.java
index b5c82ce..1cc0e79 100755
--- a/vmware-base/src/com/cloud/hypervisor/vmware/mo/HostMO.java
+++ b/vmware-base/src/com/cloud/hypervisor/vmware/mo/HostMO.java
@@ -39,6 +39,8 @@ import com.vmware.vim25.DatastoreSummary;
 import com.vmware.vim25.DynamicProperty;
 import com.vmware.vim25.HostConfigManager;
 import com.vmware.vim25.HostConnectInfo;
+import com.vmware.vim25.HostFirewallInfo;
+import com.vmware.vim25.HostFirewallRuleset;
 import com.vmware.vim25.HostHardwareSummary;
 import com.vmware.vim25.HostHyperThreadScheduleInfo;
 import com.vmware.vim25.HostIpRouteEntry;
@@ -1030,5 +1032,26 @@ public class HostMO extends BaseMO implements 
VmwareHypervisorHost {
 
         return new LicenseAssignmentManagerMO(_context, 
licenseAssignmentManager);
     }
+    
+    public void enableVncOnHostFirewall() throws Exception {
+        HostFirewallSystemMO firewallMo = getHostFirewallSystemMO();
+        boolean bRefresh = false;
+        if(firewallMo != null) {
+            HostFirewallInfo firewallInfo = firewallMo.getFirewallInfo();
+            if(firewallInfo != null && firewallInfo.getRuleset() != null) {
+                for(HostFirewallRuleset rule : firewallInfo.getRuleset()) {
+                    if("vncServer".equalsIgnoreCase(rule.getKey())) {
+                        bRefresh = true;
+                        firewallMo.enableRuleset("vncServer");
+                    } else if("gdbserver".equalsIgnoreCase(rule.getKey())) {
+                        bRefresh = true;
+                        firewallMo.enableRuleset("gdbserver");
+                    }
+                }
+            }
 
+            if(bRefresh)
+                firewallMo.refreshFirewall();
+        }
+    }
 }

http://git-wip-us.apache.org/repos/asf/cloudstack/blob/0becde90/vmware-base/src/com/cloud/hypervisor/vmware/util/VmwareContext.java
----------------------------------------------------------------------
diff --git 
a/vmware-base/src/com/cloud/hypervisor/vmware/util/VmwareContext.java 
b/vmware-base/src/com/cloud/hypervisor/vmware/util/VmwareContext.java
index 265fa64..95553fd 100755
--- a/vmware-base/src/com/cloud/hypervisor/vmware/util/VmwareContext.java
+++ b/vmware-base/src/com/cloud/hypervisor/vmware/util/VmwareContext.java
@@ -37,7 +37,6 @@ import java.util.Map;
 import javax.net.ssl.HostnameVerifier;
 import javax.net.ssl.HttpsURLConnection;
 import javax.net.ssl.SSLSession;
-import javax.xml.ws.BindingProvider;
 
 import org.apache.log4j.Logger;
 
@@ -59,12 +58,16 @@ public class VmwareContext {
 
     private static int MAX_CONNECT_RETRY = 5;
     private static int CONNECT_RETRY_INTERVAL = 1000;
+    
+       private int _CHUNKSIZE = 1*1024*1024;           // 1M
 
        private VmwareClient _vimClient;
        private String _serverAddress;
 
        private Map<String, Object> _stockMap = new HashMap<String, Object>();
-       private int _CHUNKSIZE = 1*1024*1024;           // 1M
+
+       private VmwareContextPool _pool;
+       private String _poolKey;
 
        static {
                try {
@@ -97,6 +100,12 @@ public class VmwareContext {
                        _stockMap.remove(name);
                }
        }
+       
+       public void clearStockObjects() {
+               synchronized(_stockMap) {
+                       _stockMap.clear();
+               }
+       }
 
        @SuppressWarnings("unchecked")
        public <T> T getStockObject(String name) {
@@ -109,12 +118,6 @@ public class VmwareContext {
                return _serverAddress;
        }
 
-       /*
-       public ServiceConnection getServiceConnection() {
-               return _vimClient.getServiceConnection3();
-       }
-       */
-
        public VimPortType getService() {
                return _vimClient.getService();
        }
@@ -123,12 +126,6 @@ public class VmwareContext {
                return _vimClient.getServiceContent();
        }
 
-       /*
-       public ServiceUtil getServiceUtil() {
-               return _vimClient.getServiceUtil3();
-       }
-       */
-
        public ManagedObjectReference getPropertyCollector(){
            return _vimClient.getPropCol();
        }
@@ -140,7 +137,23 @@ public class VmwareContext {
        public VmwareClient getVimClient(){
            return _vimClient;
        }
-
+       
+       public void setPoolInfo(VmwareContextPool pool, String poolKey) {
+               _pool = pool;
+               _poolKey = poolKey;
+       }
+       
+       public VmwareContextPool getPool() {
+               return _pool;
+       }
+       
+       public String getPoolKey() {
+               return _poolKey;
+       }
+       
+       public void idleCheck() throws Exception {
+               getRootFolder();
+       }
 
        public ManagedObjectReference getHostMorByPath(String inventoryPath) 
throws Exception {
                assert(inventoryPath != null);
@@ -595,6 +608,7 @@ public class VmwareContext {
        }
 
        public void close() {
+               clearStockObjects();
                try {
                        _vimClient.disconnect();
                } catch(Exception e) {

http://git-wip-us.apache.org/repos/asf/cloudstack/blob/0becde90/vmware-base/src/com/cloud/hypervisor/vmware/util/VmwareContextPool.java
----------------------------------------------------------------------
diff --git 
a/vmware-base/src/com/cloud/hypervisor/vmware/util/VmwareContextPool.java 
b/vmware-base/src/com/cloud/hypervisor/vmware/util/VmwareContextPool.java
new file mode 100644
index 0000000..3bac028
--- /dev/null
+++ b/vmware-base/src/com/cloud/hypervisor/vmware/util/VmwareContextPool.java
@@ -0,0 +1,148 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+package com.cloud.hypervisor.vmware.util;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Timer;
+import java.util.TimerTask;
+
+import org.apache.log4j.Logger;
+
+public class VmwareContextPool {
+    private static final Logger s_logger = 
Logger.getLogger(VmwareContextPool.class);
+    
+    private static final long DEFAULT_CHECK_INTERVAL = 10000;
+    private static final int DEFAULT_IDLE_QUEUE_LENGTH = 128;
+       
+       private Map<String, List<VmwareContext>> _pool;
+       private int _maxIdleQueueLength = DEFAULT_IDLE_QUEUE_LENGTH;
+       private long _idleCheckIntervalMs = DEFAULT_CHECK_INTERVAL;
+                       
+       private Timer _timer = new Timer();
+       
+       public VmwareContextPool() {
+               this(DEFAULT_IDLE_QUEUE_LENGTH, DEFAULT_CHECK_INTERVAL);
+       }
+       
+       public VmwareContextPool(int maxIdleQueueLength) {
+               this(maxIdleQueueLength, DEFAULT_CHECK_INTERVAL);
+       }
+       
+       public VmwareContextPool(int maxIdleQueueLength, long 
idleCheckIntervalMs) {
+               _pool = new HashMap<String, List<VmwareContext>>();
+               
+               _maxIdleQueueLength = maxIdleQueueLength;
+               _idleCheckIntervalMs = idleCheckIntervalMs;
+               
+               _timer.scheduleAtFixedRate(getTimerTask(), 
_idleCheckIntervalMs, _idleCheckIntervalMs);
+       }
+       
+       public VmwareContext getContext(String vCenterAddress, String 
vCenterUserName) {
+               String poolKey = composePoolKey(vCenterAddress, 
vCenterUserName);
+               synchronized(_pool) {
+                       List<VmwareContext> l = _pool.get(poolKey);
+                       if(l == null)
+                               return null;
+
+                       if(l.size() > 0) {
+                               if(s_logger.isTraceEnabled())
+                                       s_logger.trace("Return a VmwareContext 
from the pool.");
+                               
+                               VmwareContext context = l.remove(0);
+                               context.setPoolInfo(this, poolKey);
+                               return context;
+                       }
+                       
+                       if(s_logger.isInfoEnabled())
+                               s_logger.info("No VmwareContext is available 
from the idle pool, create a new one");
+                       return null;
+               }
+       }
+       
+       public void returnContext(VmwareContext context) {
+               assert(context.getPool() == this);
+               assert(context.getPoolKey() != null);
+               synchronized(_pool) {
+                       List<VmwareContext> l = _pool.get(context.getPoolKey());
+                       if(l == null) {
+                               l = new ArrayList<VmwareContext>();
+                               _pool.put(context.getPoolKey(), l);
+                       }
+                       
+                       if(l.size() < _maxIdleQueueLength) {
+                               context.clearStockObjects();
+                               l.add(context);
+                       } else {
+                               if(s_logger.isInfoEnabled())
+                                       s_logger.info("VmwareContextPool queue 
exceeds limits, queue size: " + l.size());
+                               context.close();
+                       }
+               }
+       }
+       
+       private void getIdleCheckContexts(List<VmwareContext> l, int batchSize) 
{
+               synchronized(_pool) {
+                       for(List<VmwareContext> entryList : _pool.values()) {
+                               if(entryList != null) {
+                                       int count = 0;
+                                       while(entryList.size() > 0 && count < 
batchSize) {
+                                               l.add(entryList.remove(0));
+                                               count++;
+                                       }
+                               }
+                       }
+               }
+       }
+       
+       private TimerTask getTimerTask() {
+               return new TimerTask() {
+                       @Override
+                       public void run() {
+                               try {
+                                       doIdleCheck();
+                               } catch (Throwable e) {
+                                       s_logger.error("Unexpected exception", 
e);
+                               }
+                       }
+               };
+       }
+       
+       private void doIdleCheck() {
+               List<VmwareContext> l = new ArrayList<VmwareContext>();
+               int batchSize = (int)(_idleCheckIntervalMs / 1000);     // 
calculate batch size at 1 request/sec rate
+               getIdleCheckContexts(l, batchSize);
+               
+               for(VmwareContext context : l) {
+                       try {
+                               context.idleCheck();
+                               returnContext(context);
+                       } catch(Throwable e) {
+                               s_logger.warn("Exception caught during 
VmwareContext idle check, close and discard the context", e);
+                               context.close();
+                       }
+               }
+       }
+       
+       public static String composePoolKey(String vCenterAddress, String 
vCenterUserName) {
+               assert(vCenterUserName != null);
+               assert(vCenterAddress != null);
+               return vCenterUserName + "@" + vCenterAddress;
+       }
+}

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