/*
* JBoss, Home of Professional Open Source.
* Copyright 2011, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file 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.as.threads;
import static org.jboss.as.threads.CommonAttributes.KEEPALIVE_TIME;
import static org.jboss.as.threads.CommonAttributes.TIME;
import static org.jboss.as.threads.CommonAttributes.UNIT;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import org.jboss.as.controller.AbstractWriteAttributeHandler;
import org.jboss.as.controller.AttributeDefinition;
import org.jboss.as.controller.OperationContext;
import org.jboss.as.controller.OperationFailedException;
import org.jboss.as.controller.PathAddress;
import org.jboss.as.controller.registry.ManagementResourceRegistration;
import org.jboss.dmr.ModelNode;
import org.jboss.msc.service.ServiceController;
/**
* Abstract superclass for write-attribute operation handlers for the threads subsystem.
*
* @author Brian Stansberry
* @author Alexey Loubyansky
*/
public abstract class ThreadsWriteAttributeOperationHandler extends AbstractWriteAttributeHandler<Boolean> {
protected final AttributeDefinition[] attributes;
protected final Map<String, AttributeDefinition> runtimeAttributes = new HashMap<String, AttributeDefinition>();
/**
* Creates a handler that doesn't validate values.
* @param attributes all persistent attributes of the
* @param runtimeAttributes attributes whose updated value can immediately be applied to the runtime
*/
public ThreadsWriteAttributeOperationHandler(AttributeDefinition[] attributes, AttributeDefinition[] runtimeAttributes) {
super(attributes);
this.attributes = attributes;
for(AttributeDefinition attr : runtimeAttributes) {
this.runtimeAttributes.put(attr.getName(), attr);
}
}
@Override
protected boolean applyUpdateToRuntime(final OperationContext context, final ModelNode operation,
final String attributeName, final ModelNode newValue,
final ModelNode currentValue, final HandbackHolder<Boolean> handbackHolder) throws OperationFailedException {
AttributeDefinition attr = runtimeAttributes.get(attributeName);
if (attr == null) {
// Not a runtime attribute; restart required
return true;
}
else {
final ServiceController<?> service = getService(context, operation);
if (service == null) {
// The service isn't installed, so the work done in the Stage.MODEL part is all there is to it
return false;
} else if (service.getState() != ServiceController.State.UP) {
// Service is installed but not up?
//throw new IllegalStateException(String.format("Cannot apply attribue %s to runtime; service %s is not in state %s, it is in state %s",
// attributeName, MessagingServices.JBOSS_MESSAGING, ServiceController.State.UP, hqService.getState()));
// No, don't barf; just let the update apply to the model and put the server in a reload-required state
return true;
} else {
// Actually apply the update
final ModelNode model = context.readResource(PathAddress.EMPTY_ADDRESS).getModel();
applyOperation(context, model, attributeName, service, false);
handbackHolder.setHandback(Boolean.TRUE);
return false;
}
}
}
@Override
protected void revertUpdateToRuntime(final OperationContext context, final ModelNode operation,
final String attributeName, final ModelNode valueToRestore,
final ModelNode valueToRevert, final Boolean handback) throws OperationFailedException {
if (handback != null && handback.booleanValue() && runtimeAttributes.containsKey(attributeName)) {
final ServiceController<?> service = getService(context, operation);
if (service != null && service.getState() == ServiceController.State.UP) {
// Create and execute a write-attribute operation that uses the valueToRestore
ModelNode revertModel = context.readResource(PathAddress.EMPTY_ADDRESS).getModel().clone();
revertModel.get(attributeName).set(valueToRestore);
applyOperation(context, revertModel, attributeName, service, true);
}
}
}
public void registerAttributes(final ManagementResourceRegistration registry) {
for(AttributeDefinition attribute : attributes) {
registry.registerReadWriteAttribute(attribute, null, this);
}
}
protected abstract ServiceController<?> getService(final OperationContext context, final ModelNode model) throws OperationFailedException;
protected abstract void applyOperation(final OperationContext context, ModelNode operation, String attributeName,
ServiceController<?> service, boolean forRollback) throws OperationFailedException;
static TimeSpec getTimeSpec(OperationContext context, ModelNode model, TimeUnit defaultUnit) throws OperationFailedException {
ModelNode value = PoolAttributeDefinitions.KEEPALIVE_TIME.resolveModelAttribute(context, model);
if (!value.hasDefined(TIME)) {
throw ThreadsMessages.MESSAGES.missingTimeSpecTime(TIME, KEEPALIVE_TIME);
}
final TimeUnit unit;
if (!value.hasDefined(UNIT)) {
unit = defaultUnit;
} else {
try {
unit = Enum.valueOf(TimeUnit.class, value.get(UNIT).asString());
} catch(IllegalArgumentException e) {
throw ThreadsMessages.MESSAGES.failedToParseUnit(UNIT, Arrays.asList(TimeUnit.values()));
}
}
return new TimeSpec(unit, value.get(TIME).asLong());
}
}