/*
* JBoss, Home of Professional Open Source.
* Copyright 2015, 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.infinispan.server.commons.controller;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
import org.jboss.as.controller.AbstractRuntimeOnlyHandler;
import org.jboss.as.controller.OperationContext;
import org.jboss.as.controller.OperationFailedException;
import org.jboss.as.controller.registry.ManagementResourceRegistration;
import org.jboss.dmr.ModelNode;
/**
* Generic {@link org.jboss.as.controller.OperationStepHandler} for runtime metrics.
* @author Paul Ferraro
*/
public class MetricHandler<C> extends AbstractRuntimeOnlyHandler implements Registration {
private final Map<String, Metric<C>> metrics = new HashMap<>();
private final MetricExecutor<C> executor;
public <M extends Enum<M> & Metric<C>> MetricHandler(MetricExecutor<C> executor, Class<M> metricClass) {
this(executor, metricClass.getEnumConstants());
}
public MetricHandler(MetricExecutor<C> executor, Metric<C>[] metrics) {
this(executor, Arrays.asList(metrics));
}
public MetricHandler(MetricExecutor<C> executor, Iterable<Metric<C>> metrics) {
this.executor = executor;
for (Metric<C> metric : metrics) {
this.metrics.put(metric.getDefinition().getName(), metric);
}
}
@Override
public void register(ManagementResourceRegistration registration) {
for (Metric<C> metric : this.metrics.values()) {
registration.registerReadOnlyAttribute(metric.getDefinition(), this);
}
}
@Override
protected void executeRuntimeStep(OperationContext context, ModelNode operation) {
String name = Operations.getAttributeName(operation);
try {
ModelNode result = this.executor.execute(context, this.metrics.get(name));
if (result != null) {
context.getResult().set(result);
}
} catch (OperationFailedException e) {
context.getFailureDescription().set(e.getLocalizedMessage());
}
context.completeStep(OperationContext.ResultHandler.NOOP_RESULT_HANDLER);
}
}