/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.sling.installer.factories.subsystems.impl;
import org.apache.sling.installer.api.tasks.ChangeStateTask;
import org.apache.sling.installer.api.tasks.InstallTask;
import org.apache.sling.installer.api.tasks.InstallationContext;
import org.apache.sling.installer.api.tasks.ResourceState;
import org.apache.sling.installer.api.tasks.TaskResource;
import org.apache.sling.installer.api.tasks.TaskResourceGroup;
import org.osgi.framework.BundleContext;
import org.osgi.framework.ServiceReference;
import org.osgi.service.subsystem.Subsystem;
/**
* Update subsystem by uninstalling and installing it.
*/
public class UpdateSubsystemTask extends InstallTask {
private static final String INSTALL_ORDER = "54-";
private final Subsystem rootSubsystem;
private final ServiceReference<Subsystem> subsystemReference;
private final BundleContext bundleContext;
public UpdateSubsystemTask(final TaskResourceGroup grp,
final BundleContext bundleContext,
final ServiceReference<Subsystem> ref,
final Subsystem rootSubsystem) {
super(grp);
this.bundleContext = bundleContext;
this.subsystemReference = ref;
this.rootSubsystem = rootSubsystem;
}
@Override
public void execute(final InstallationContext ctx) {
final TaskResource tr = this.getResource();
ctx.log("Updating subsystem from {}", tr);
Subsystem subsystem = null;
try {
subsystem = this.bundleContext.getService(this.subsystemReference);
if ( subsystem != null ) {
subsystem.stop();
subsystem.uninstall();
ctx.addTaskToCurrentCycle(new InstallSubsystemTask(this.getResourceGroup(), this.rootSubsystem));
} else {
ctx.log("Unable to update subsystem {}.", tr);
ctx.addTaskToCurrentCycle(new ChangeStateTask(this.getResourceGroup(), ResourceState.IGNORED));
}
} finally {
if ( subsystem != null ) {
this.bundleContext.ungetService(this.subsystemReference);
}
}
}
@Override
public String getSortKey() {
return INSTALL_ORDER + getResource().getURL();
}
}