/**
* extract the list of information from the process variables and make them available locally.
* Note that if no task instance variables are specified, the full process variables scope will be
* visible (that means that the user did not specify a special task instance scope).
*/
public void initializeVariables(TaskInstance taskInstance) {
ClassLoader surroundingClassLoader = Thread.currentThread().getContextClassLoader();
try {
// set context class loader correctly for delegation class
// (https://jira.jboss.org/jira/browse/JBPM-1448)
Thread.currentThread()
.setContextClassLoader(
JbpmConfiguration.getProcessClassLoader(
taskInstance.getTask().getProcessDefinition()));
if (taskControllerDelegation != null) {
TaskControllerHandler taskControllerHandler =
(TaskControllerHandler) taskControllerDelegation.instantiate();
ProcessInstance processInstance = taskInstance.getTaskMgmtInstance().getProcessInstance();
ContextInstance contextInstance =
(processInstance != null ? processInstance.getContextInstance() : null);
Token token = taskInstance.getToken();
if (UserCodeInterceptorConfig.userCodeInterceptor != null) {
UserCodeInterceptorConfig.userCodeInterceptor.executeTaskControllerInitialization(
taskControllerHandler, taskInstance, contextInstance, token);
} else {
taskControllerHandler.initializeTaskVariables(taskInstance, contextInstance, token);
}
} else {
Token token = taskInstance.getToken();
ProcessInstance processInstance = token.getProcessInstance();
ContextInstance contextInstance = processInstance.getContextInstance();
if (variableAccesses != null) {
Iterator iter = variableAccesses.iterator();
while (iter.hasNext()) {
VariableAccess variableAccess = (VariableAccess) iter.next();
String mappedName = variableAccess.getMappedName();
if (variableAccess.isReadable()) {
String variableName = variableAccess.getVariableName();
Object value = contextInstance.getVariable(variableName, token);
log.debug(
"creating task instance variable '"
+ mappedName
+ "' from process variable '"
+ variableName
+ "', value '"
+ value
+ "'");
taskInstance.setVariableLocally(mappedName, value);
} else {
log.debug(
"creating task instance local variable '"
+ mappedName
+ "'. initializing with null value.");
taskInstance.setVariableLocally(mappedName, null);
}
}
}
}
} finally {
Thread.currentThread().setContextClassLoader(surroundingClassLoader);
}
}
/** update the process variables from the the task-instance variables. */
public void submitParameters(TaskInstance taskInstance) {
ClassLoader surroundingClassLoader = Thread.currentThread().getContextClassLoader();
try {
// set context class loader correctly for delegation class
// (https://jira.jboss.org/jira/browse/JBPM-1448)
Thread.currentThread()
.setContextClassLoader(
JbpmConfiguration.getProcessClassLoader(
taskInstance.getTask().getProcessDefinition()));
if (taskControllerDelegation != null) {
TaskControllerHandler taskControllerHandler =
(TaskControllerHandler) taskControllerDelegation.instantiate();
ProcessInstance processInstance = taskInstance.getTaskMgmtInstance().getProcessInstance();
ContextInstance contextInstance =
(processInstance != null ? processInstance.getContextInstance() : null);
Token token = taskInstance.getToken();
if (UserCodeInterceptorConfig.userCodeInterceptor != null) {
UserCodeInterceptorConfig.userCodeInterceptor.executeTaskControllerSubmission(
taskControllerHandler, taskInstance, contextInstance, token);
} else {
taskControllerHandler.submitTaskVariables(taskInstance, contextInstance, token);
}
} else {
Token token = taskInstance.getToken();
ProcessInstance processInstance = token.getProcessInstance();
ContextInstance contextInstance = processInstance.getContextInstance();
if (variableAccesses != null) {
String missingTaskVariables = null;
Iterator iter = variableAccesses.iterator();
while (iter.hasNext()) {
VariableAccess variableAccess = (VariableAccess) iter.next();
String mappedName = variableAccess.getMappedName();
// first check if the required variableInstances are present
if ((variableAccess.isRequired()) && (!taskInstance.hasVariableLocally(mappedName))) {
if (missingTaskVariables == null) {
missingTaskVariables = mappedName;
} else {
missingTaskVariables += ", " + mappedName;
}
}
}
// if there are missing, required parameters, throw an
// IllegalArgumentException
if (missingTaskVariables != null) {
throw new IllegalArgumentException("missing task variables: " + missingTaskVariables);
}
iter = variableAccesses.iterator();
while (iter.hasNext()) {
VariableAccess variableAccess = (VariableAccess) iter.next();
String mappedName = variableAccess.getMappedName();
String variableName = variableAccess.getVariableName();
if (variableAccess.isWritable()) {
Object value = taskInstance.getVariable(mappedName);
if (value != null) {
log.debug(
"submitting task variable '"
+ mappedName
+ "' to process variable '"
+ variableName
+ "', value '"
+ value
+ "'");
contextInstance.setVariable(variableName, value, token);
}
}
}
}
}
} finally {
Thread.currentThread().setContextClassLoader(surroundingClassLoader);
}
}
