diff options
Diffstat (limited to 'eaaf_core/src/main/java')
3 files changed, 90 insertions, 53 deletions
diff --git a/eaaf_core/src/main/java/at/gv/egiz/eaaf/core/impl/idp/process/ExecutionContextImpl.java b/eaaf_core/src/main/java/at/gv/egiz/eaaf/core/impl/idp/process/ExecutionContextImpl.java index 88a95795..3cd696df 100644 --- a/eaaf_core/src/main/java/at/gv/egiz/eaaf/core/impl/idp/process/ExecutionContextImpl.java +++ b/eaaf_core/src/main/java/at/gv/egiz/eaaf/core/impl/idp/process/ExecutionContextImpl.java @@ -44,9 +44,10 @@ public class ExecutionContextImpl implements ExecutionContext { private static final long serialVersionUID = 1L; - private Map<String, Serializable> ctxData = Collections.synchronizedMap(new HashMap<String, Serializable>()); + private final Map<String, Serializable> ctxData = Collections.synchronizedMap(new HashMap<String, Serializable>()); private String processInstanceId; + private boolean markedAsCancelled = false; /** * Creates a new instance. @@ -93,7 +94,7 @@ public class ExecutionContextImpl implements ExecutionContext { @Override public String toString() { - StringBuilder builder = new StringBuilder(); + final StringBuilder builder = new StringBuilder(); builder.append("ExecutionContextImpl ["); builder.append("id=").append(processInstanceId); builder.append(", variables="); @@ -102,4 +103,15 @@ public class ExecutionContextImpl implements ExecutionContext { return builder.toString(); } + @Override + public boolean isProcessCancelled() { + return markedAsCancelled; + } + + @Override + public void setCanceleProcessFlag() { + markedAsCancelled = true; + + } + } diff --git a/eaaf_core/src/main/java/at/gv/egiz/eaaf/core/impl/idp/process/ProcessEngineImpl.java b/eaaf_core/src/main/java/at/gv/egiz/eaaf/core/impl/idp/process/ProcessEngineImpl.java index b6b42850..53f50e1f 100644 --- a/eaaf_core/src/main/java/at/gv/egiz/eaaf/core/impl/idp/process/ProcessEngineImpl.java +++ b/eaaf_core/src/main/java/at/gv/egiz/eaaf/core/impl/idp/process/ProcessEngineImpl.java @@ -64,14 +64,14 @@ import at.gv.egiz.eaaf.core.impl.idp.process.model.Transition; */ public class ProcessEngineImpl implements ProcessEngine { - private Logger log = LoggerFactory.getLogger(getClass()); + private final Logger log = LoggerFactory.getLogger(getClass()); @Autowired ProcessInstanceStoreDAO piStoreDao; @Autowired ApplicationContext context; - private ProcessDefinitionParser pdp = new ProcessDefinitionParser(); + private final ProcessDefinitionParser pdp = new ProcessDefinitionParser(); - private Map<String, ProcessDefinition> processDefinitions = new ConcurrentHashMap<String, ProcessDefinition>(); + private final Map<String, ProcessDefinition> processDefinitions = new ConcurrentHashMap<String, ProcessDefinition>(); private final static String MDC_CTX_PI_NAME = "processInstanceId"; private final static String MDC_CTX_TASK_NAME = "taskId"; @@ -86,7 +86,7 @@ public class ProcessEngineImpl implements ProcessEngine { @Override public String registerProcessDefinition(InputStream processDefinitionInputStream) throws ProcessDefinitionParserException{ - ProcessDefinition pd = pdp.parse(processDefinitionInputStream); + final ProcessDefinition pd = pdp.parse(processDefinitionInputStream); postValidationOfProcessDefintion(pd); @@ -104,7 +104,7 @@ public class ProcessEngineImpl implements ProcessEngine { */ public void setProcessDefinitions(Iterable<ProcessDefinition> processDefinitions) { this.processDefinitions.clear(); - for (ProcessDefinition pd : processDefinitions) { + for (final ProcessDefinition pd : processDefinitions) { if (this.processDefinitions.containsKey(pd.getId())) { throw new IllegalArgumentException("Duplicate process definition identifier '" + pd.getId() + "'."); } @@ -125,18 +125,18 @@ public class ProcessEngineImpl implements ProcessEngine { @Override public String createProcessInstance(String processDefinitionId, ExecutionContext executionContext) throws ProcessExecutionException { // look for respective process definition - ProcessDefinition pd = processDefinitions.get(processDefinitionId); + final ProcessDefinition pd = processDefinitions.get(processDefinitionId); if (pd == null) { throw new ProcessExecutionException("Unable to find process definition for process '" + processDefinitionId + "'."); } // create and keep process instance - ProcessInstance pi = new ProcessInstance(pd, executionContext); + final ProcessInstance pi = new ProcessInstance(pd, executionContext); log.info("Creating process instance from process definition '{}': {}", processDefinitionId, pi.getId()); try { saveOrUpdateProcessInstance(pi); - } catch (EAAFException e) { + } catch (final EAAFException e) { throw new ProcessExecutionException("Unable to persist process instance.", e); } @@ -158,7 +158,7 @@ public class ProcessEngineImpl implements ProcessEngine { + " includes NO 'ProcessInstanceId'"); } - ProcessInstance pi = loadProcessInstance(pendingReq.getProcessInstanceId()); + final ProcessInstance pi = loadProcessInstance(pendingReq.getProcessInstanceId()); if (pi == null ) { throw new ProcessExecutionException("Process instance '" + pendingReq.getProcessInstanceId() + "' does not exist."); @@ -179,7 +179,7 @@ public class ProcessEngineImpl implements ProcessEngine { if (!ProcessInstanceState.ENDED.equals(pi.getState())) saveOrUpdateProcessInstance(pi); - } catch (EAAFException e) { + } catch (final EAAFException e) { throw new ProcessExecutionException("Unable to load/save process instance.", e); } finally { @@ -198,7 +198,7 @@ public class ProcessEngineImpl implements ProcessEngine { + " includes NO 'ProcessInstanceId'"); } - ProcessInstance pi = loadProcessInstance(pendingReq.getProcessInstanceId()); + final ProcessInstance pi = loadProcessInstance(pendingReq.getProcessInstanceId()); if (pi == null ) { throw new ProcessExecutionException("Process instance '" + pendingReq.getProcessInstanceId() + "' does not exist."); @@ -223,7 +223,7 @@ public class ProcessEngineImpl implements ProcessEngine { if (!ProcessInstanceState.ENDED.equals(pi.getState())) saveOrUpdateProcessInstance(pi); - } catch (EAAFException e) { + } catch (final EAAFException e) { throw new ProcessExecutionException("Unable to load/save process instance.", e); } finally { @@ -239,7 +239,7 @@ public class ProcessEngineImpl implements ProcessEngine { * @throws ProcessExecutionException Thrown in case of error (when the referenced class does not implement {@link Task} for instance). */ private Task createTaskInstance(TaskInfo ti) throws ProcessExecutionException { - String clazz = StringUtils.trimToNull(ti.getTaskImplementingClass()); + final String clazz = StringUtils.trimToNull(ti.getTaskImplementingClass()); Task task = null; if (clazz != null) { @@ -248,7 +248,7 @@ public class ProcessEngineImpl implements ProcessEngine { try { instanceClass = context.getBean(clazz); - } catch (Exception e) { + } catch (final Exception e) { throw new ProcessExecutionException("Unable to get class '" + clazz + "' associated with task '" + ti.getId() + "' .", e); } @@ -259,7 +259,7 @@ public class ProcessEngineImpl implements ProcessEngine { try { task = (Task) instanceClass; - } catch (Exception e) { + } catch (final Exception e) { throw new ProcessExecutionException("Unable to instantiate class '" + clazz + "' associated with task '" + ti.getId() + "' .", e); } } @@ -277,19 +277,19 @@ public class ProcessEngineImpl implements ProcessEngine { if (ProcessInstanceState.ENDED.equals(pi.getState())) { throw new ProcessExecutionException("Process for instance '" + pi.getId() + "' has already been ended."); } - ProcessDefinition pd = pi.getProcessDefinition(); - ProcessNode processNode = pd.getProcessNode(pi.getNextId()); + final ProcessDefinition pd = pi.getProcessDefinition(); + final ProcessNode processNode = pd.getProcessNode(pi.getNextId()); log.debug("Processing node '{}'.", processNode.getId()); // distinguish process node types StartEvent, TaskInfo and EndEvent if (processNode instanceof TaskInfo) { // TaskInfo types need to be executed - TaskInfo ti = (TaskInfo) processNode; + final TaskInfo ti = (TaskInfo) processNode; MDC.put(MDC_CTX_TASK_NAME, ti.getId()); try { log.debug("Processing task '{}'.", ti.getId()); - Task task = createTaskInstance(ti); + final Task task = createTaskInstance(ti); if (task != null) { try { log.debug("Executing task implementation for task '{}'.", ti.getId()); @@ -297,35 +297,39 @@ public class ProcessEngineImpl implements ProcessEngine { pendingReq = task.execute(pendingReq, pi.getExecutionContext()); log.debug("Returned from execution of task '{}'.", ti.getId()); log.trace("Execution context after task execution: {}", pi.getExecutionContext().keySet()); - } catch (Throwable t) { + + } catch (final Throwable t) { throw new ProcessExecutionException("Error executing task '" + ti.getId() + "'.", t); + + } + + //check if process was cancelled dynamically by task + if (pi.getExecutionContext().isProcessCancelled()) { + log.debug("Processing task '{}' was cancelled by Task: '{}'.", pi.getId(), ti.getId()); + processFinishEvent(pi); + return; + } + } else { log.debug("No task implementing class set."); + } } finally { MDC.remove(MDC_CTX_TASK_NAME); + } } else if (processNode instanceof EndEvent) { - log.info("Finishing process instance '{}'.", pi.getId()); - - try { - piStoreDao.remove(pi.getId()); - - } catch (EAAFException e) { - throw new ProcessExecutionException("Unable to remove process instance.", e); - - } - pi.setState(ProcessInstanceState.ENDED); - log.debug("Final process context: {}", pi.getExecutionContext().keySet()); + processFinishEvent(pi); return; + } final ExpressionEvaluationContext expressionContext = new ExpressionEvaluationContextImpl(pi); // traverse pointer - Transition t = IterableUtils.find(processNode.getOutgoingTransitions(), new Predicate<Transition>() { + final Transition t = IterableUtils.find(processNode.getOutgoingTransitions(), new Predicate<Transition>() { @Override public boolean evaluate(Transition transition) { if (transitionConditionExpressionEvaluator != null && transition.getConditionExpression() != null) { @@ -356,7 +360,7 @@ public class ProcessEngineImpl implements ProcessEngine { execute(pi, pendingReq); } } - + @Override public ProcessInstance getProcessInstance(String processInstanceId) { @@ -364,7 +368,7 @@ public class ProcessEngineImpl implements ProcessEngine { try { processInstance = loadProcessInstance(processInstanceId); - } catch (EAAFException e) { + } catch (final EAAFException e) { throw new RuntimeException("The process instance '" + processInstanceId + "' could not be retrieved.", e); } @@ -381,12 +385,12 @@ public class ProcessEngineImpl implements ProcessEngine { * @throws MOADatabaseException Thrown if an error occurs while accessing the database. */ private void saveOrUpdateProcessInstance(ProcessInstance processInstance) throws EAAFException { - ProcessInstanceStore store = new ProcessInstanceStore(); + final ProcessInstanceStore store = new ProcessInstanceStore(); - ExecutionContext ctx = processInstance.getExecutionContext(); + final ExecutionContext ctx = processInstance.getExecutionContext(); - Map<String, Serializable> ctxData = new HashMap<String, Serializable>(); - for (String key : ctx.keySet()) { + final Map<String, Serializable> ctxData = new HashMap<String, Serializable>(); + for (final String key : ctx.keySet()) { ctxData.put(key, ctx.get(key)); } store.setExecutionContextData(ctxData); @@ -408,20 +412,20 @@ public class ProcessEngineImpl implements ProcessEngine { */ private ProcessInstance loadProcessInstance(String processInstanceId) throws EAAFException { - ProcessInstanceStore piStore = piStoreDao.load(processInstanceId); + final ProcessInstanceStore piStore = piStoreDao.load(processInstanceId); if (piStore == null) { return null; } - ExecutionContext executionContext = new ExecutionContextImpl(piStore.getProcessInstanceId()); + final ExecutionContext executionContext = new ExecutionContextImpl(piStore.getProcessInstanceId()); - Map<String, Serializable> executionContextData = piStore.getExecutionContextData(); - for (String key : executionContextData.keySet()) { + final Map<String, Serializable> executionContextData = piStore.getExecutionContextData(); + for (final String key : executionContextData.keySet()) { executionContext.put(key, executionContextData.get(key)); } - ProcessInstance pi = new ProcessInstance(processDefinitions.get(piStore.getProcessDefinitionId()), executionContext); + final ProcessInstance pi = new ProcessInstance(processDefinitions.get(piStore.getProcessDefinitionId()), executionContext); pi.setNextId(piStore.getNextTaskId()); pi.setState(piStore.getProcessState()); @@ -441,10 +445,31 @@ public class ProcessEngineImpl implements ProcessEngine { try { piStoreDao.remove(processInstanceId); - } catch (EAAFException e) { + } catch (final EAAFException e) { + throw new ProcessExecutionException("Unable to remove process instance.", e); + + } + + } + + /** + * Finish a process-flow and remove any process-flow related information + * + * @param pi + * @throws ProcessExecutionException + */ + private void processFinishEvent(ProcessInstance pi) throws ProcessExecutionException { + log.info("Finishing process instance '{}'.", pi.getId()); + + try { + piStoreDao.remove(pi.getId()); + + } catch (final EAAFException e) { throw new ProcessExecutionException("Unable to remove process instance.", e); } + pi.setState(ProcessInstanceState.ENDED); + log.debug("Final process context: {}", pi.getExecutionContext().keySet()); } @@ -458,11 +483,11 @@ public class ProcessEngineImpl implements ProcessEngine { */ private void postValidationOfProcessDefintion(ProcessDefinition pd) throws ProcessDefinitionParserException{ try { - for(TaskInfo task : pd.getTaskInfos().values()) { + for(final TaskInfo task : pd.getTaskInfos().values()) { createTaskInstance(task); } - } catch (ProcessExecutionException e) { + } catch (final ProcessExecutionException e) { log.error("Post-validation of process definition: {} find an error: {}", pd.getId(), e.getMessage()); throw new ProcessDefinitionParserException("Post-validation find an error in process definition:" + pd.getId(), e); diff --git a/eaaf_core/src/main/java/at/gv/egiz/eaaf/core/impl/idp/process/ProcessInstance.java b/eaaf_core/src/main/java/at/gv/egiz/eaaf/core/impl/idp/process/ProcessInstance.java index 17d8ea8f..6db1dc7d 100644 --- a/eaaf_core/src/main/java/at/gv/egiz/eaaf/core/impl/idp/process/ProcessInstance.java +++ b/eaaf_core/src/main/java/at/gv/egiz/eaaf/core/impl/idp/process/ProcessInstance.java @@ -49,13 +49,13 @@ public class ProcessInstance implements Serializable { private static final long serialVersionUID = 1L; private static final int RND_ID_LENGTH = 22; - private ProcessDefinition processDefinition; + private final ProcessDefinition processDefinition; private String nextId; private Date lru; - private ExecutionContext executionContext; + private final ExecutionContext executionContext; private ProcessInstanceState state = ProcessInstanceState.NOT_STARTED; - private Logger log = LoggerFactory.getLogger(getClass()); + private final Logger log = LoggerFactory.getLogger(getClass()); /** * Creates a new process instance, based on a given process definition and a @@ -74,7 +74,7 @@ public class ProcessInstance implements Serializable { executionContext = new ExecutionContextImpl(); } if (executionContext.getProcessInstanceId() == null) { - String pdIdLocalPart = RandomStringUtils.random(RND_ID_LENGTH, 0, 0, true, true, null, + final String pdIdLocalPart = RandomStringUtils.random(RND_ID_LENGTH, 0, 0, true, true, null, SecureRandomHolder.getInstance()); executionContext.setProcessInstanceId(this.processDefinition.getId() + "-" + pdIdLocalPart); } else { @@ -169,7 +169,7 @@ public class ProcessInstance implements Serializable { @Override public String toString() { - StringBuilder builder = new StringBuilder(); + final StringBuilder builder = new StringBuilder(); builder.append("ProcessInstance ["); builder.append("id=").append(executionContext.getProcessInstanceId()); builder.append(", idle since=").append( |