org.eclipse.linuxtools.lttng2.control.ui/src/org/eclipse/linuxtools/internal/lttng2/control/ui/views/handlers/NewConnectionHandler.java

   1 /**********************************************************************
   2  * Copyright (c) 2012, 2014 Ericsson and others
   3  *
   4  * All rights reserved. This program and the accompanying materials are
   5  * made available under the terms of the Eclipse Public License v1.0 which
   6  * accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *   Bernd Hufmann               - Initial API and implementation
  11  *   Anna Dushistova(Montavista) - [382684] Allow reusing already defined connections that have Files and Shells subsystems
  12  **********************************************************************/
  13 package org.eclipse.linuxtools.internal.lttng2.control.ui.views.handlers;
  14
  15 import java.util.ArrayList;
  16 import java.util.Arrays;
  17
  18 import org.eclipse.core.commands.ExecutionEvent;
  19 import org.eclipse.core.commands.ExecutionException;
  20 import org.eclipse.jface.dialogs.MessageDialog;
  21 import org.eclipse.jface.window.Window;
  22 import org.eclipse.linuxtools.internal.lttng2.control.ui.views.ControlView;
  23 import org.eclipse.linuxtools.internal.lttng2.control.ui.views.dialogs.INewConnectionDialog;
  24 import org.eclipse.linuxtools.internal.lttng2.control.ui.views.dialogs.TraceControlDialogFactory;
  25 import org.eclipse.linuxtools.internal.lttng2.control.ui.views.messages.Messages;
  26 import org.eclipse.linuxtools.internal.lttng2.control.ui.views.model.ITraceControlComponent;
  27 import org.eclipse.linuxtools.internal.lttng2.control.ui.views.model.impl.TargetNodeComponent;
  28 import org.eclipse.linuxtools.internal.lttng2.control.ui.views.remote.IRemoteSystemProxy;
  29 import org.eclipse.rse.core.IRSESystemType;
  30 import org.eclipse.rse.core.RSECorePlugin;
  31 import org.eclipse.rse.core.model.IHost;
  32 import org.eclipse.rse.core.model.ISystemRegistry;
  33 import org.eclipse.rse.core.subsystems.ISubSystem;
  34 import org.eclipse.rse.subsystems.files.core.servicesubsystem.IFileServiceSubSystem;
  35 import org.eclipse.ui.IWorkbenchPage;
  36 import org.eclipse.ui.IWorkbenchPart;
  37 import org.eclipse.ui.IWorkbenchWindow;
  38 import org.eclipse.ui.PlatformUI;
  39
  40 /**
  41  * <p>
  42  * Command handler for creation new connection for trace control.
  43  * </p>
  44  *
  45  * @author Bernd Hufmann
  46  */
  47 public class NewConnectionHandler extends BaseControlViewHandler {
  48
  49     // ------------------------------------------------------------------------
  50     // Constants
  51     // ------------------------------------------------------------------------
  52
  53     /**
  54      * The trace control system type defined for LTTng version 2.0 and later.
  55      */
  56     public static final String TRACE_CONTROL_SYSTEM_TYPE = "org.eclipse.linuxtools.internal.lttng2.ui.control.systemType"; //$NON-NLS-1$
  57
  58     // ------------------------------------------------------------------------
  59     // Attributes
  60     // ------------------------------------------------------------------------
  61
  62     /**
  63      * The parent trace control component the new node will be added to.
  64      */
  65     private ITraceControlComponent fRoot = null;
  66
  67     @Override
  68     public Object execute(ExecutionEvent event) throws ExecutionException {
  69         assert (fRoot != null);
  70
  71         IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
  72         if (window == null) {
  73             return false;
  74         }
  75
  76         ISystemRegistry registry = RSECorePlugin.getTheSystemRegistry();
  77
  78         // get system type definition for LTTng 2.x connection
  79         IRSESystemType sysType = RSECorePlugin.getTheCoreRegistry().getSystemTypeById(TRACE_CONTROL_SYSTEM_TYPE);
  80
  81         // get all hosts for this system type
  82         IHost[] hosts = getSuitableHosts();
  83
  84         // Open dialog box for the node name and address
  85         final INewConnectionDialog dialog = TraceControlDialogFactory.getInstance().getNewConnectionDialog();
  86         dialog.setTraceControlParent(fRoot);
  87         dialog.setHosts(hosts);
  88         dialog.setPort(IRemoteSystemProxy.INVALID_PORT_NUMBER);
  89
  90         if (dialog.open() != Window.OK) {
  91             return null;
  92         }
  93
  94         String hostName = dialog.getConnectionName();
  95         String hostAddress = dialog.getHostName();
  96         int port = dialog.getPort();
  97
  98         // get the singleton RSE registry
  99         IHost host = null;
 100
 101         for (int i = 0; i < hosts.length; i++) {
 102             if (hosts[i].getAliasName().equals(hostName)) {
 103                 host = hosts[i];
 104                 break;
 105             }
 106         }
 107
 108         if (host == null) {
 109             // if there's no host then we will create it
 110             try {
 111                 // create the host object as an SSH Only connection
 112                 host = registry.createHost(
 113                         sysType,       //System Type Name
 114                         hostName,      //Connection name
 115                         hostAddress,   //IP Address
 116                         "Connection to Host"); //description //$NON-NLS-1$
 117             }
 118             catch (Exception e) {
 119                 MessageDialog.openError(window.getShell(),
 120                         Messages.TraceControl_EclipseCommandFailure,
 121                         Messages.TraceControl_NewNodeCreationFailure + " (" + hostName + ", " + hostAddress + ")" + ":\n" + e.toString());  //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$
 122                 return null;
 123             }
 124         }
 125
 126         if (host != null) {
 127             fLock.lock();
 128             try {
 129                 // successful creation of host
 130                 TargetNodeComponent node = null;
 131                 if (!fRoot.containsChild(hostName)) {
 132                     node = new TargetNodeComponent(hostName, fRoot, host);
 133                     node.setPort(port);
 134                     fRoot.addChild(node);
 135                 }
 136                 else {
 137                     node = (TargetNodeComponent)fRoot.getChild(hostName);
 138                 }
 139
 140                 node.connect();
 141             } finally {
 142                 fLock.unlock();
 143             }
 144         }
 145         return null;
 146     }
 147
 148     private static IHost[] getSuitableHosts() {
 149         // need shells and files
 150         ArrayList<IHost> result = new ArrayList<>();
 151         ArrayList<IHost> shellConnections = new ArrayList<>(
 152                 Arrays.asList(RSECorePlugin.getTheSystemRegistry()
 153                         .getHostsBySubSystemConfigurationCategory("shells"))); //$NON-NLS-1$
 154
 155         for (IHost connection : shellConnections) {
 156             ISubSystem[] subSystems = connection.getSubSystems();
 157             for (int i = 0; i < subSystems.length; i++) {
 158                 if (subSystems[i] instanceof IFileServiceSubSystem) {
 159                     result.add(connection);
 160                     break;
 161                 }
 162             }
 163         }
 164
 165         return result.toArray(new IHost[result.size()]);
 166     }
 167
 168     @Override
 169     public boolean isEnabled() {
 170
 171         // Get workbench page for the Control View
 172         IWorkbenchPage page = getWorkbenchPage();
 173         if (page == null) {
 174             return false;
 175         }
 176
 177         ITraceControlComponent root = null;
 178
 179         // no need to verify part because it has been already done in getWorkbenchPage()
 180         IWorkbenchPart part = page.getActivePart();
 181         root = ((ControlView) part).getTraceControlRoot();
 182
 183         boolean isEnabled = root != null;
 184
 185         fLock.lock();
 186         try {
 187             fRoot = null;
 188             if (isEnabled) {
 189                 fRoot = root;
 190             }
 191         } finally {
 192             fLock.unlock();
 193         }
 194
 195         return isEnabled;
 196     }
 197 }