org.eclipse.linuxtools.lttng/src/org/eclipse/linuxtools/lttng/state/experiment/StateManagerFactory.java

   1 /*******************************************************************************
   2  * Copyright (c) 2009 Ericsson
   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  *   Alvaro Sanchez-Leon (alvsan09@gmail.com) - Initial API and implementation
  11  *******************************************************************************/
  12
  13 package org.eclipse.linuxtools.lttng.state.experiment;
  14
  15 import java.util.Map;
  16
  17 import org.eclipse.linuxtools.lttng.state.StateManager;
  18 import org.eclipse.linuxtools.lttng.state.StateStacksHandler;
  19 import org.eclipse.linuxtools.lttng.state.model.LttngTraceState;
  20 import org.eclipse.linuxtools.lttng.state.model.StateModelFactory;
  21
  22 /**
  23  * @author alvaro
  24  *
  25  */
  26 public class StateManagerFactory {
  27         // ========================================================================
  28         // Data
  29         // =======================================================================
  30
  31         private static StateExperimentManager experimentManager = null;
  32         private static Map<String, StateManager> instanceBook = null;
  33
  34         // ========================================================================
  35         // Methods
  36         // =======================================================================
  37
  38         /**
  39          * Provide a stateManager instance per trace
  40          *
  41          * @return
  42          */
  43         public static StateManager getManager(String traceUniqueId) {
  44
  45                 if (traceUniqueId == null) {
  46                         return null;
  47                 }
  48
  49                 initCheck();
  50
  51                 if (instanceBook.containsKey(traceUniqueId)) {
  52                         return instanceBook.get(traceUniqueId);
  53                 }
  54
  55                 LttngTraceState traceModel = StateModelFactory.getStateEntryInstance();
  56                 StateStacksHandler stateInputHandler = new StateStacksHandler(
  57                                 traceModel);
  58                 StateManager manager = new StateManager(stateInputHandler);
  59
  60                 instanceBook.put(traceUniqueId, manager);
  61                 return manager;
  62         }
  63
  64         /**
  65          * Provide the State trace set manager
  66          *
  67          * @return
  68          */
  69         public static StateExperimentManager getExperimentManager() {
  70                 initCheck();
  71                 return experimentManager;
  72         }
  73
  74         /**
  75          * Remove previously registered managers
  76          *
  77          * @param traceUniqueId
  78          */
  79         public static void removeManager(String traceUniqueId) {
  80                 initCheck();
  81                 if (traceUniqueId != null && instanceBook.containsKey(traceUniqueId)) {
  82                         instanceBook.remove(traceUniqueId);
  83                 }
  84         }
  85
  86         /**
  87          * initialization of factory
  88          */
  89         private static void initCheck() {
  90                 if (experimentManager == null) {
  91                         experimentManager = new StateExperimentManager();
  92                         instanceBook = experimentManager.getManagersByID();
  93                 }
  94         }
  95
  96         /**
  97          * Clea up resources
  98          */
  99         public static void dispose() {
 100                 if (experimentManager != null) {
 101                         experimentManager.dispose();
 102                         experimentManager = null;
 103                         instanceBook = null;
 104                 }
 105         }
 106 }