X-Git-Url: http://git.argeo.org/?a=blobdiff_plain;f=org.argeo.slc.core%2Fsrc%2Forg%2Fargeo%2Fslc%2Fcore%2Fexecution%2FExecutionThread.java;fp=org.argeo.slc.core%2Fsrc%2Forg%2Fargeo%2Fslc%2Fcore%2Fexecution%2FExecutionThread.java;h=48a5df38bed6f9bf2be8c2e7e8d8d786af0f0712;hb=a9b97cc33383ded70277f49aa287f84903334e70;hp=0000000000000000000000000000000000000000;hpb=d1298659fe6f179d1cbbc8c89f108a0bbc5b4edf;p=gpl%2Fargeo-slc.git

diff --git a/org.argeo.slc.core/src/org/argeo/slc/core/execution/ExecutionThread.java b/org.argeo.slc.core/src/org/argeo/slc/core/execution/ExecutionThread.java
new file mode 100644
index 000000000..48a5df38b
--- /dev/null
+++ b/org.argeo.slc.core/src/org/argeo/slc/core/execution/ExecutionThread.java
@@ -0,0 +1,123 @@
+/*
+ * Copyright (C) 2007-2012 Argeo GmbH
+ *
+ * Licensed 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 org.argeo.slc.core.execution;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.argeo.slc.SlcException;
+import org.argeo.slc.execution.ExecutionFlowDescriptor;
+import org.argeo.slc.execution.ExecutionModulesManager;
+import org.argeo.slc.execution.ExecutionStep;
+import org.argeo.slc.execution.RealizedFlow;
+import org.springframework.security.core.Authentication;
+import org.springframework.security.core.context.SecurityContextHolder;
+
+/** Thread of a single execution */
+public class ExecutionThread extends Thread {
+	public final static String SYSPROP_EXECUTION_AUTO_UPGRADE = "slc.execution.autoupgrade";
+	private final static Log log = LogFactory.getLog(ExecutionThread.class);
+
+	private ExecutionModulesManager executionModulesManager;
+	private final RealizedFlow realizedFlow;
+
+	private List<Runnable> destructionCallbacks = new ArrayList<Runnable>();
+
+	public ExecutionThread(ProcessThreadGroup processThreadGroup,
+			ExecutionModulesManager executionModulesManager,
+			RealizedFlow realizedFlow) {
+		super(processThreadGroup, "Flow "
+				+ realizedFlow.getFlowDescriptor().getName());
+		this.realizedFlow = realizedFlow;
+		this.executionModulesManager = executionModulesManager;
+	}
+
+	public void run() {
+		// authenticate thread
+		Authentication authentication = getProcessThreadGroup()
+				.getAuthentication();
+		if (authentication == null)
+			throw new SlcException("Can only execute authenticated threads");
+		SecurityContextHolder.getContext().setAuthentication(authentication);
+
+		// Retrieve execution flow descriptor
+		ExecutionFlowDescriptor executionFlowDescriptor = realizedFlow
+				.getFlowDescriptor();
+		String flowName = executionFlowDescriptor.getName();
+
+		getProcessThreadGroup().dispatchAddStep(
+				new ExecutionStep(realizedFlow.getModuleName(),
+						ExecutionStep.PHASE_START, "Flow " + flowName));
+
+		try {
+			String autoUpgrade = System
+					.getProperty(SYSPROP_EXECUTION_AUTO_UPGRADE);
+			if (autoUpgrade != null && autoUpgrade.equals("true"))
+				executionModulesManager.upgrade(realizedFlow
+						.getModuleNameVersion());
+			executionModulesManager.start(realizedFlow.getModuleNameVersion());
+			//
+			// START FLOW
+			//
+			executionModulesManager.execute(realizedFlow);
+			// END FLOW
+		} catch (FlowConfigurationException e) {
+			String msg = "Configuration problem with flow " + flowName + ":\n"
+					+ e.getMessage();
+			log.error(msg);
+			getProcessThreadGroup().dispatchAddStep(
+					new ExecutionStep(realizedFlow.getModuleName(),
+							ExecutionStep.ERROR, msg + " " + e.getMessage()));
+		} catch (Exception e) {
+			// TODO: re-throw exception ?
+			String msg = "Execution of flow " + flowName + " failed.";
+			log.error(msg, e);
+			getProcessThreadGroup().dispatchAddStep(
+					new ExecutionStep(realizedFlow.getModuleName(),
+							ExecutionStep.ERROR, msg + " " + e.getMessage()));
+		} finally {
+			getProcessThreadGroup().dispatchAddStep(
+					new ExecutionStep(realizedFlow.getModuleName(),
+							ExecutionStep.PHASE_END, "Flow " + flowName));
+			processDestructionCallbacks();
+		}
+	}
+
+	private synchronized void processDestructionCallbacks() {
+		for (int i = destructionCallbacks.size() - 1; i >= 0; i--) {
+			try {
+				destructionCallbacks.get(i).run();
+			} catch (Exception e) {
+				log.warn("Could not process destruction callback " + i
+						+ " in thread " + getName(), e);
+			}
+		}
+	}
+
+	/**
+	 * Gather object destruction callback to be called in reverse order at the
+	 * end of the thread
+	 */
+	synchronized void registerDestructionCallback(String name, Runnable callback) {
+		destructionCallbacks.add(callback);
+	}
+
+	protected ProcessThreadGroup getProcessThreadGroup() {
+		return (ProcessThreadGroup) getThreadGroup();
+	}
+}
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