X-Git-Url: http://git.argeo.org/?a=blobdiff_plain;f=runtime%2Forg.argeo.slc.core%2Fsrc%2Fmain%2Fjava%2Forg%2Fargeo%2Fslc%2Fcore%2Fexecution%2FInstantiationManager.java;fp=runtime%2Forg.argeo.slc.core%2Fsrc%2Fmain%2Fjava%2Forg%2Fargeo%2Fslc%2Fcore%2Fexecution%2FInstantiationManager.java;h=c3d844c46c54c01bd267792e6ec1af8d23057d64;hb=ee6c3543a0ff9403420ce6a9c647723269f14331;hp=0000000000000000000000000000000000000000;hpb=9daa55ce316d52ffd8f30dc0d1b516ccf78a8c73;p=gpl%2Fargeo-slc.git

diff --git a/runtime/org.argeo.slc.core/src/main/java/org/argeo/slc/core/execution/InstantiationManager.java b/runtime/org.argeo.slc.core/src/main/java/org/argeo/slc/core/execution/InstantiationManager.java
new file mode 100644
index 000000000..c3d844c46
--- /dev/null
+++ b/runtime/org.argeo.slc.core/src/main/java/org/argeo/slc/core/execution/InstantiationManager.java
@@ -0,0 +1,74 @@
+package org.argeo.slc.core.execution;
+
+import java.util.Stack;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.argeo.slc.SlcException;
+import org.argeo.slc.execution.ExecutionFlow;
+
+public class InstantiationManager {
+
+	private final static Log log = LogFactory.getLog(InstantiationManager.class);
+	
+	private ThreadLocal<Stack<ExecutionFlow> > flowStack = new ThreadLocal<Stack<ExecutionFlow> >();
+	
+	public Object createRef(String name) {
+		
+		if((flowStack.get() == null) ||  flowStack.get().empty()) {
+			throw new SlcException("No flow is currently initializing."
+					+ " Declare ParameterRef as inner beans or prototypes.");
+		}
+		
+		return getInitializingFlowParameter(name);
+	}	
+	
+	public void flowInitializationStarted(ExecutionFlow flow, String flowName) {
+		if (log.isTraceEnabled())
+			log.trace("Start initialization of " + flow.hashCode() + " ("
+					+ flow + " - " + flow.getClass() + ")");
+		
+		// set the flow name if it is DefaultExecutionFlow
+		if(flow instanceof DefaultExecutionFlow) {
+			((DefaultExecutionFlow) flow).setBeanName(flowName);
+		}
+		
+//		log.info("# flowInitializationStarted " + flowName);
+		// create a stack for this thread if there is none
+		if(flowStack.get() == null) {
+			flowStack.set(new Stack<ExecutionFlow>());
+		}
+		flowStack.get().push(flow);
+	}
+
+	public void flowInitializationFinished(ExecutionFlow flow, String flowName) {
+		if (log.isTraceEnabled())
+			log.trace("Finish initialization of " + flow.hashCode() + " ("
+					+ flow + " - " + flow.getClass() + ")");
+		ExecutionFlow registeredFlow = flowStack.get().pop();
+		if (registeredFlow != null) {
+			if (!flow.getName().equals(registeredFlow.getName()))
+				throw new SlcException("Current flow is " + flow);
+//			log.info("# flowInitializationFinished " + flowName);
+//			initializingFlow.set(null);
+		}
+	}	
+	
+	public Object getInitializingFlowParameter(String key) {
+		if ((flowStack.get() == null) || flowStack.get().empty())
+			throw new SlcException("No initializing flow available.");
+		
+		// first look in the outer flow (that may override parameters)
+		for(int i = 0; i < flowStack.get().size(); i++) {
+			if(flowStack.get().elementAt(i).isSetAsParameter(key)) {
+				return flowStack.get().elementAt(i).getParameter(key);
+			}
+		}
+		throw new SlcException("Key " + key + " is not set as parameter in "
+				+ flowStack.get().firstElement().toString() + " (stack size="+flowStack.get().size()+")");		
+	}
+
+	public Boolean isInFlowInitialization() {
+		return (flowStack.get() != null) && !flowStack.get().empty();
+	}	
+}