/*
* JBoss, Home of Professional Open Source
* Copyright 2010, Red Hat Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.arquillian.context;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.ListIterator;
import java.util.Map;
import org.jboss.as.server.deployment.SetupAction;
/**
* Sets up and tears down a set of contexts, represented by a list of {@link SetupAction}s. If {@link #setup()} completes
* successfully then {@link #teardown()} must be called.
*
* @author Stuart Douglas
*
*/
public class ContextManager {
private final List<SetupAction> setupActions;
ContextManager(List<SetupAction> setupActions) {
List<SetupAction> actions = new ArrayList<SetupAction>(setupActions);
Collections.sort(actions, new Comparator<SetupAction>() {
@Override
public int compare(SetupAction arg0, SetupAction arg1) {
return arg0.priority() > arg1.priority() ? -1 : arg0.priority() == arg1.priority() ? 0 : 1;
}
});
this.setupActions = Collections.unmodifiableList(actions);
}
/**
* Sets up the contexts. If any of the setup actions fail then any setup contexts are torn down, and then the exception is
* wrapped and thrown
*/
public void setup(Map<String, Object> properties) {
final List<SetupAction> sucessfulActions = new ArrayList<SetupAction>();
for (SetupAction action : setupActions) {
try {
action.setup(properties);
sucessfulActions.add(action);
} catch (Throwable e) {
for (SetupAction s : sucessfulActions) {
try {
s.teardown(properties);
} catch (Throwable t) {
// we ignore these, and just propegate the exception that caused the setup to fail
}
}
throw new RuntimeException(e);
}
}
}
/**
* Tears down the contexts. If an exception is thrown by a {@link SetupAction} it is wrapped and re-thrown after all
* {@link SetupAction#teardown()} methods have been called.
* <p>
* Contexts are torn down in the oposite order to which they are set up (i.e. the first context set up is the last to be
* torn down).
* <p>
* If more than one teardown() method thrown an exception then only the first is propegated.
*/
public void teardown(Map<String, Object> properties) {
Throwable exceptionToThrow = null;
ListIterator<SetupAction> itr = setupActions.listIterator(setupActions.size());
while (itr.hasPrevious()) {
SetupAction action = itr.previous();
try {
action.teardown(properties);
} catch (Throwable e) {
if (exceptionToThrow == null) {
exceptionToThrow = e;
}
}
}
if (exceptionToThrow != null) {
throw new RuntimeException(exceptionToThrow);
}
}
}