/*
 * JBoss, Home of Professional Open Source
 * Copyright 2014 Red Hat Inc. and/or its affiliates and other contributors
 * as indicated by the @author tags. All rights reserved.
 * See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * This copyrighted material is made available to anyone wishing to use,
 * modify, copy, or redistribute it subject to the terms and conditions
 * of the GNU Lesser General Public License, v. 2.1.
 * This program is distributed in the hope that it will be useful, but WITHOUT A
 * 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,
 * v.2.1 along with this distribution; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA  02110-1301, USA.
 */
package org.jboss.as.clustering.infinispan.subsystem;

import java.util.HashMap;
import java.util.Map;

import org.infinispan.Cache;
import org.infinispan.interceptors.CacheMgmtInterceptor;
import org.jboss.as.clustering.controller.Metric;
import org.jboss.as.controller.AttributeDefinition;
import org.jboss.as.controller.SimpleAttributeDefinitionBuilder;
import org.jboss.dmr.ModelNode;
import org.jboss.dmr.ModelType;

/**
 * Enumeration of management metrics for cache eviction
 * @author Paul Ferraro
 */
public enum EvictionMetric implements Metric<Cache<?, ?>> {

    EVICTIONS(MetricKeys.EVICTIONS, ModelType.LONG) {
        @Override
        public ModelNode getValue(Cache<?, ?> cache) {
            CacheMgmtInterceptor interceptor = CacheMetric.findInterceptor(cache, CacheMgmtInterceptor.class);
            return new ModelNode((interceptor != null) ? interceptor.getEvictions() : 0);
        }
    },
    ;
    private final AttributeDefinition definition;

    private EvictionMetric(String name, ModelType type) {
        this.definition = new SimpleAttributeDefinitionBuilder(name, type, true).setStorageRuntime().build();
    }

    @Override
    public AttributeDefinition getDefinition() {
        return this.definition;
    }

    private static final Map<String, EvictionMetric> metrics = new HashMap<>();

    static {
        for (EvictionMetric metric: EvictionMetric.values()) {
            metrics.put(metric.definition.getName(), metric);
        }
    }

    public static EvictionMetric forName(String name) {
        return metrics.get(name);
    }
}