org.argeo.slc.core/src/org/argeo/slc/core/execution/AbstractExecutionModulesManager.java

   1 /*
   2  * Copyright (C) 2007-2012 Argeo GmbH
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *         http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package org.argeo.slc.core.execution;
  17
  18 import java.util.Map;
  19
  20 import org.apache.commons.logging.Log;
  21 import org.apache.commons.logging.LogFactory;
  22 import org.argeo.slc.execution.ExecutionContext;
  23 import org.argeo.slc.execution.ExecutionFlow;
  24 import org.argeo.slc.execution.ExecutionFlowDescriptorConverter;
  25 import org.argeo.slc.execution.ExecutionModulesManager;
  26 import org.argeo.slc.execution.RealizedFlow;
  27
  28 /** Provides the base feature of an execution module manager. */
  29 public abstract class AbstractExecutionModulesManager implements
  30                 ExecutionModulesManager {
  31         private final static Log log = LogFactory
  32                         .getLog(AbstractExecutionModulesManager.class);
  33
  34         // private List<FilteredNotifier> filteredNotifiers = Collections
  35         // .synchronizedList(new ArrayList<FilteredNotifier>());
  36
  37         protected abstract ExecutionFlow findExecutionFlow(String moduleName,
  38                         String moduleVersion, String flowName);
  39
  40         protected abstract ExecutionContext findExecutionContext(String moduleName,
  41                         String moduleVersion);
  42
  43         protected abstract ExecutionFlowDescriptorConverter getExecutionFlowDescriptorConverter(
  44                         String moduleName, String moduleVersion);
  45
  46         public void execute(RealizedFlow realizedFlow) {
  47                 if (log.isTraceEnabled())
  48                         log.trace("Executing " + realizedFlow);
  49
  50                 String moduleName = realizedFlow.getModuleName();
  51                 String moduleVersion = realizedFlow.getModuleVersion();
  52
  53                 Map<? extends String, ? extends Object> variablesToAdd = getExecutionFlowDescriptorConverter(
  54                                 moduleName, moduleVersion).convertValues(
  55                                 realizedFlow.getFlowDescriptor());
  56                 ExecutionContext executionContext = findExecutionContext(moduleName,
  57                                 moduleVersion);
  58                 for (String key : variablesToAdd.keySet())
  59                         executionContext.setVariable(key, variablesToAdd.get(key));
  60
  61                 ExecutionFlow flow = findExecutionFlow(moduleName, moduleVersion,
  62                                 realizedFlow.getFlowDescriptor().getName());
  63
  64                 //
  65                 // Actually runs the flow, IN THIS THREAD
  66                 //
  67                 executionContext.beforeFlow(flow);
  68                 try {
  69                         flow.run();
  70                 } finally {
  71                         executionContext.afterFlow(flow);
  72                 }
  73                 //
  74                 //
  75                 //
  76         }
  77
  78         // public void dispatchUpdateStatus(ExecutionProcess process,
  79         // String oldStatus, String newStatus) {
  80         // // filtered notifiers
  81         // for (Iterator<FilteredNotifier> it = filteredNotifiers.iterator(); it
  82         // .hasNext();) {
  83         // FilteredNotifier filteredNotifier = it.next();
  84         // if (filteredNotifier.receiveFrom(process))
  85         // filteredNotifier.getNotifier().updateStatus(process, oldStatus,
  86         // newStatus);
  87         // }
  88         //
  89         // }
  90
  91         // public void dispatchAddSteps(ExecutionProcess process,
  92         // List<ExecutionStep> steps) {
  93         // process.addSteps(steps);
  94         // for (Iterator<FilteredNotifier> it = filteredNotifiers.iterator(); it
  95         // .hasNext();) {
  96         // FilteredNotifier filteredNotifier = it.next();
  97         // if (filteredNotifier.receiveFrom(process))
  98         // filteredNotifier.getNotifier().addSteps(process, steps);
  99         // }
 100         // }
 101
 102         // public void registerProcessNotifier(ExecutionProcessNotifier notifier,
 103         // Map<String, String> properties) {
 104         // filteredNotifiers.add(new FilteredNotifier(notifier, properties));
 105         // }
 106         //
 107         // public void unregisterProcessNotifier(ExecutionProcessNotifier notifier,
 108         // Map<String, String> properties) {
 109         // filteredNotifiers.remove(notifier);
 110         // }
 111
 112         // protected class FilteredNotifier {
 113         // private final ExecutionProcessNotifier notifier;
 114         // private final String processId;
 115         //
 116         // public FilteredNotifier(ExecutionProcessNotifier notifier,
 117         // Map<String, String> properties) {
 118         // super();
 119         // this.notifier = notifier;
 120         // if (properties == null)
 121         // properties = new HashMap<String, String>();
 122         // if (properties.containsKey(SLC_PROCESS_ID))
 123         // processId = properties.get(SLC_PROCESS_ID);
 124         // else
 125         // processId = null;
 126         // }
 127         //
 128         // /**
 129         // * Whether event from this process should be received by this listener.
 130         // */
 131         // public Boolean receiveFrom(ExecutionProcess process) {
 132         // if (processId != null)
 133         // if (process.getUuid().equals(processId))
 134         // return true;
 135         // else
 136         // return false;
 137         // return true;
 138         // }
 139         //
 140         // @Override
 141         // public int hashCode() {
 142         // return notifier.hashCode();
 143         // }
 144         //
 145         // @Override
 146         // public boolean equals(Object obj) {
 147         // if (obj instanceof FilteredNotifier) {
 148         // FilteredNotifier fn = (FilteredNotifier) obj;
 149         // return notifier.equals(fn.notifier);
 150         // } else if (obj instanceof ExecutionProcessNotifier) {
 151         // ExecutionProcessNotifier epn = (ExecutionProcessNotifier) obj;
 152         // return notifier.equals(epn);
 153         // } else
 154         // return false;
 155         // }
 156         //
 157         // public ExecutionProcessNotifier getNotifier() {
 158         // return notifier;
 159         // }
 160         //
 161         // }
 162 }