org.activiti.engine.impl.interceptor.CommandInvoker Maven / Gradle / Ivy
/* 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.activiti.engine.impl.interceptor;
import org.activiti.engine.impl.agenda.AbstractOperation;
import org.activiti.engine.impl.context.Context;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
*/
public class CommandInvoker extends AbstractCommandInterceptor {
private static final Logger logger = LoggerFactory.getLogger(CommandInvoker.class);
@Override
@SuppressWarnings("unchecked")
public T execute(final CommandConfig config, final Command command) {
final CommandContext commandContext = Context.getCommandContext();
// Execute the command.
// This will produce operations that will be put on the agenda.
commandContext.getAgenda().planOperation(new Runnable() {
@Override
public void run() {
commandContext.setResult(command.execute(commandContext));
}
});
// Run loop for agenda
executeOperations(commandContext);
// At the end, call the execution tree change listeners.
// TODO: optimization: only do this when the tree has actually changed (ie check dbSqlSession).
if (commandContext.hasInvolvedExecutions()) {
Context.getAgenda().planExecuteInactiveBehaviorsOperation();
executeOperations(commandContext);
}
return (T) commandContext.getResult();
}
protected void executeOperations(final CommandContext commandContext) {
while (!commandContext.getAgenda().isEmpty()) {
Runnable runnable = commandContext.getAgenda().getNextOperation();
executeOperation(runnable);
}
}
public void executeOperation(Runnable runnable) {
if (runnable instanceof AbstractOperation) {
AbstractOperation operation = (AbstractOperation) runnable;
// Execute the operation if the operation has no execution (i.e. it's an operation not working on a process instance)
// or the operation has an execution and it is not ended
if (operation.getExecution() == null || !operation.getExecution().isEnded()) {
if (logger.isDebugEnabled()) {
logger.debug("Executing operation {} ", operation.getClass());
}
runnable.run();
}
} else {
runnable.run();
}
}
@Override
public CommandInterceptor getNext() {
return null;
}
@Override
public void setNext(CommandInterceptor next) {
throw new UnsupportedOperationException("CommandInvoker must be the last interceptor in the chain");
}
}