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* JBoss, Home of Professional Open Source.
* Copyright 2017, 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.wildfly.extension.undertow.filters;
import io.undertow.server.handlers.proxy.mod_cluster.ModClusterStatus;
import org.jboss.as.controller.AttributeDefinition;
import org.jboss.as.controller.OperationContext;
import org.jboss.as.controller.OperationFailedException;
import org.jboss.as.controller.OperationStepHandler;
import org.jboss.as.controller.PathAddress;
import org.jboss.as.controller.SimpleAttributeDefinitionBuilder;
import org.jboss.as.controller.SimpleResourceDefinition;
import org.jboss.as.controller.registry.ManagementResourceRegistration;
import org.jboss.dmr.ModelNode;
import org.jboss.dmr.ModelType;
import org.wildfly.extension.undertow.Constants;
import org.wildfly.extension.undertow.UndertowExtension;
/**
* Runtime representation of a mod_cluster balancer
*
* @author Stuart Douglas
*/
class ModClusterBalancerDefinition extends SimpleResourceDefinition {
public static ModClusterBalancerDefinition INSTANCE = new ModClusterBalancerDefinition();
public static final AttributeDefinition STICKY_SESSION_COOKIE = new SimpleAttributeDefinitionBuilder(Constants.STICKY_SESSION_COOKIE, ModelType.STRING)
.setRequired(false)
.setStorageRuntime()
.build();
public static final AttributeDefinition STICKY_SESSION_PATH = new SimpleAttributeDefinitionBuilder(Constants.STICKY_SESSION_PATH, ModelType.STRING)
.setRequired(false)
.setStorageRuntime()
.build();
public static final AttributeDefinition MAX_ATTEMPTS = new SimpleAttributeDefinitionBuilder(Constants.MAX_ATTEMPTS, ModelType.INT)
.setRequired(false)
.setStorageRuntime()
.build();
public static final AttributeDefinition WAIT_WORKER = new SimpleAttributeDefinitionBuilder(Constants.WAIT_WORKER, ModelType.INT)
.setRequired(false)
.setStorageRuntime()
.build();
public static final AttributeDefinition STICKY_SESSION = new SimpleAttributeDefinitionBuilder(Constants.STICKY_SESSION, ModelType.BOOLEAN)
.setRequired(false)
.setStorageRuntime()
.build();
public static final AttributeDefinition STICKY_SESSION_FORCE = new SimpleAttributeDefinitionBuilder(Constants.STICKY_SESSION_FORCE, ModelType.BOOLEAN)
.setRequired(false)
.setStorageRuntime()
.build();
public static final AttributeDefinition STICKY_SESSION_REMOVE = new SimpleAttributeDefinitionBuilder(Constants.STICKY_SESSION_REMOVE, ModelType.BOOLEAN)
.setRequired(false)
.setStorageRuntime()
.build();
private ModClusterBalancerDefinition() {
super(new Parameters(UndertowExtension.BALANCER, UndertowExtension.getResolver("handler", "mod-cluster", "balancer"))
.setRuntime());
}
@Override
public void registerChildren(ManagementResourceRegistration resourceRegistration) {
resourceRegistration.registerSubModel(ModClusterNodeDefinition.INSTANCE);
resourceRegistration.registerSubModel(ModClusterLoadBalancingGroupDefinition.INSTANCE);
}
@Override
public void registerAttributes(ManagementResourceRegistration resourceRegistration) {
resourceRegistration.registerReadOnlyAttribute(MAX_ATTEMPTS, new AbstractBalancerOperation() {
@Override
protected void handleNode(OperationContext context, ModClusterStatus.LoadBalancer ctx, ModelNode operation) throws OperationFailedException {
context.getResult().set(new ModelNode(ctx.getMaxAttempts()));
}
});
resourceRegistration.registerReadOnlyAttribute(STICKY_SESSION_COOKIE, new AbstractBalancerOperation() {
@Override
protected void handleNode(OperationContext context, ModClusterStatus.LoadBalancer ctx, ModelNode operation) throws OperationFailedException {
final String stickySessionCookie = ctx.getStickySessionCookie();
if(stickySessionCookie == null) {
context.getResult().set(new ModelNode());
} else {
context.getResult().set(new ModelNode(stickySessionCookie));
}
}
});
resourceRegistration.registerReadOnlyAttribute(STICKY_SESSION_PATH, new AbstractBalancerOperation() {
@Override
protected void handleNode(OperationContext context, ModClusterStatus.LoadBalancer ctx, ModelNode operation) throws OperationFailedException {
final String stickySessionPath = ctx.getStickySessionPath();
if(stickySessionPath == null) {
context.getResult().set(new ModelNode());
} else {
context.getResult().set(new ModelNode(stickySessionPath));
}
}
});
resourceRegistration.registerReadOnlyAttribute(WAIT_WORKER, new AbstractBalancerOperation() {
@Override
protected void handleNode(OperationContext context, ModClusterStatus.LoadBalancer ctx, ModelNode operation) throws OperationFailedException {
context.getResult().set(new ModelNode(ctx.getWaitWorker()));
}
});
resourceRegistration.registerReadOnlyAttribute(STICKY_SESSION, new AbstractBalancerOperation() {
@Override
protected void handleNode(OperationContext context, ModClusterStatus.LoadBalancer ctx, ModelNode operation) throws OperationFailedException {
context.getResult().set(new ModelNode(ctx.isStickySession()));
}
});
resourceRegistration.registerReadOnlyAttribute(STICKY_SESSION_REMOVE, new AbstractBalancerOperation() {
@Override
protected void handleNode(OperationContext context, ModClusterStatus.LoadBalancer ctx, ModelNode operation) throws OperationFailedException {
context.getResult().set(new ModelNode(ctx.isStickySessionRemove()));
}
});
resourceRegistration.registerReadOnlyAttribute(STICKY_SESSION_FORCE, new AbstractBalancerOperation() {
@Override
protected void handleNode(OperationContext context, ModClusterStatus.LoadBalancer ctx, ModelNode operation) throws OperationFailedException {
context.getResult().set(new ModelNode(ctx.isStickySessionForce()));
}
});
}
private abstract class AbstractBalancerOperation implements OperationStepHandler {
@Override
public final void execute(OperationContext context, ModelNode operation) throws OperationFailedException {
PathAddress address = context.getCurrentAddress();
int current = address.size() - 1;
String balancerName = address.getElement(current--).getValue();
String modClusterName = address.getElement(current--).getValue();
ModClusterService service = ModClusterResource.service(modClusterName);
if (service == null) {
context.getResult().set(new ModelNode());
context.completeStep(OperationContext.ResultHandler.NOOP_RESULT_HANDLER);
return;
}
ModClusterStatus.LoadBalancer balancer = service.getModCluster().getController().getStatus().getLoadBalancer(balancerName);
if (balancer == null) {
context.getResult().set(new ModelNode());
context.completeStep(OperationContext.ResultHandler.NOOP_RESULT_HANDLER);
return;
}
handleNode(context, balancer, operation);
}
protected abstract void handleNode(OperationContext context, ModClusterStatus.LoadBalancer ctx, ModelNode operation) throws OperationFailedException ;
}
}