+++ /dev/null
-package org.argeo.slc.core.execution.generator;
-
-import java.util.ArrayList;
-import java.util.Iterator;
-import java.util.List;
-import java.util.Map;
-
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
-import org.argeo.slc.SlcException;
-import org.argeo.slc.core.execution.DefaultExecutionSpec;
-import org.argeo.slc.execution.ExecutionContext;
-import org.argeo.slc.execution.ExecutionFlow;
-import org.argeo.slc.execution.ExecutionSpec;
-import org.springframework.context.ApplicationContext;
-import org.springframework.context.ApplicationContextAware;
-
-/**
- * Execution Flow calling a list of <code>Runnable</code> (identified by their
- * bean name in the Spring Application Context) after configuring the Execution
- * context and a Map potentially shared by the called <code>Runnable</code>
- *
- */
-public class RunnableCallFlow implements ExecutionFlow, ApplicationContextAware {
-
- private final static Log log = LogFactory.getLog(RunnableCallFlow.class);
-
- /**
- * Key in the execution context for the index of the call (e.g. 0 for the
- * first runnable called, ...)
- */
- public final static String VAR_CALL_INDEX = "slcVar.runnableCallFlow.callIndex";
-
- /**
- * Name of the flow. Also bean name
- */
- private String name;
-
- /**
- * Path of the flow
- */
- private String path;
-
- /**
- * Whether an exception in a <code>Runnable</code> shall stop the execution
- * of the flow
- */
- private Boolean failOnError = true;
-
- /**
- * List of <code>Runnable</code> to call, with bean name, execution
- * variables and context values
- */
- private List<RunnableCall> runnableCalls;
-
- /**
- * Map potentially referenced by called flows. Updated with the context
- * values of a Runnable before calling it.
- */
- private Map<String, Object> sharedContextValuesMap;
-
- /**
- * ExecutionSpec of the flow. Does not contain any attribute.
- */
- private ExecutionSpec executionSpec = new DefaultExecutionSpec();
-
- /**
- * Reference to the ExecutionContext
- */
- private ExecutionContext executionContext;
-
- /**
- * Reference to the Spring <code>ApplicationContext</code>. Set via
- * <code>setApplicationContext</code>, the class implementing
- * <code>ApplicationContextAware</code>
- */
- private ApplicationContext applicationContext;
-
- /**
- * Runs a <code>Runnable</code> after configuring the Execution Context and
- * <code>sharedContextValuesMap</code>
- *
- * @param runnable
- * the <code>Runnable</code> to call
- * @param executionVariables
- * the variables to add to the <code>ExecutionContext</code>
- * @param contextValues
- * the variables to add to <code>sharedContextValuesMap</code>
- * @param callIndex
- * index of the call (0 for the first called
- * <code>Runnable</code>) set as variable of the
- * <code>ExecutionContext</code>
- */
- private void run(Runnable runnable, Map<String, Object> executionVariables,
- Map<String, Object> contextValues, int callIndex) {
- // add all variables to the Execution Context
- for (Map.Entry<String, Object> entry : executionVariables.entrySet()) {
- executionContext.setVariable(entry.getKey(), entry.getValue());
- }
-
- // add call Index Variable
- executionContext.setVariable(VAR_CALL_INDEX, callIndex);
-
- // clear sharedContextValues and add all values of contextValues
- if (sharedContextValuesMap != null) {
- sharedContextValuesMap.clear();
- sharedContextValuesMap.putAll(contextValues);
- }
-
- // then run the runnable
- doExecuteRunnable(runnable);
- }
-
- public void doExecuteRunnable(Runnable runnable) {
- runnable.run();
- }
-
- /**
- * Executes the flow. For each <code>RunnableCall</code>, the corresponding
- * flow is retrieved from the Spring Application Context, the
- * <code>ExecutionContext</code> and <code>sharedContextValuesMap</code> are
- * configured and the <code>Runnable</code> is called.
- */
- public void run() {
- if (applicationContext == null) {
- throw new SlcException("No ApplicationContext defined");
- }
-
- try {
- for (int callIndex = 0; callIndex < runnableCalls.size(); ++callIndex) {
- RunnableCall runnableCall = runnableCalls.get(callIndex);
- Object bean = applicationContext.getBean(
- runnableCall.getBeanName(), Runnable.class);
- if (log.isDebugEnabled())
- log.debug("Running flow '" + runnableCall.getBeanName()
- + "'");
- run((Runnable) bean, runnableCall.getExecutionVariables(),
- runnableCall.getContextValues(), callIndex);
- }
- } catch (RuntimeException e) {
- if (failOnError)
- throw e;
- else {
- log.error("Execution flow failed,"
- + " but process did not fail"
- + " because failOnError property"
- + " is set to false: " + e);
- if (log.isTraceEnabled())
- e.printStackTrace();
- }
- }
- }
-
- public Iterator<Runnable> runnables() {
- List<Runnable> runnables = new ArrayList<Runnable>();
- for (int callIndex = 0; callIndex < runnableCalls.size(); ++callIndex) {
- RunnableCall runnableCall = runnableCalls.get(callIndex);
- Object bean = applicationContext.getBean(
- runnableCall.getBeanName(), Runnable.class);
- runnables.add((Runnable) bean);
- }
- return runnables.iterator();
- }
-
- public Runnable getRunnable() {
- if (runnableCalls.size() == 1)
- return runnables().next();
- else
- throw new SlcException("There are " + runnableCalls.size()
- + " runnables in flow " + getName());
- }
-
- @Override
- public String toString() {
- return new StringBuffer("RunnableCallFlow ").append(name).toString();
- }
-
- public ExecutionSpec getExecutionSpec() {
- return executionSpec;
- }
-
- public String getName() {
- return name;
- }
-
- public Object getParameter(String key) {
- throw new SlcException("RunnableCallFlow have no parameters");
- }
-
- public String getPath() {
- return path;
- }
-
- public Boolean isSetAsParameter(String key) {
- // The ExecutionSpec having no attribute,
- // always return false
- return false;
- }
-
- public void setName(String name) {
- this.name = name;
- }
-
- public void setPath(String path) {
- this.path = path;
- }
-
- public void setExecutionContext(ExecutionContext executionContext) {
- this.executionContext = executionContext;
- }
-
- public void setRunnableCalls(List<RunnableCall> runnableCalls) {
- this.runnableCalls = runnableCalls;
- }
-
- public void setApplicationContext(ApplicationContext applicationContext) {
- this.applicationContext = applicationContext;
- }
-
- public void setSharedContextValuesMap(Map<String, Object> contextValues) {
- this.sharedContextValuesMap = contextValues;
- }
-
- public void setFailOnError(Boolean failOnError) {
- this.failOnError = failOnError;
- }
-
-}
projects / gpl / argeo-slc.git / blobdiff