HadoopExternalResourceAnalyzer.java

/**
 * Copyright (c) 2009-2011 VMware, Inc. All Rights Reserved.
 *
 * Licensed 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 com.springsource.insight.plugin.hadoop;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;

import com.springsource.insight.intercept.operation.Operation;
import com.springsource.insight.intercept.topology.AbstractExternalResourceAnalyzer;
import com.springsource.insight.intercept.topology.ExternalResourceDescriptor;
import com.springsource.insight.intercept.topology.ExternalResourceType;
import com.springsource.insight.intercept.topology.MD5NameGenerator;
import com.springsource.insight.intercept.trace.Frame;
import com.springsource.insight.intercept.trace.Trace;
import com.springsource.insight.util.ListUtil;

public class HadoopExternalResourceAnalyzer extends AbstractExternalResourceAnalyzer {
    private static final HadoopExternalResourceAnalyzer INSTANCE = new HadoopExternalResourceAnalyzer();

    private HadoopExternalResourceAnalyzer() {
        super(OperationCollectionTypes.MAP_TYPE.type);
    }

    public static final HadoopExternalResourceAnalyzer getInstance() {
        return INSTANCE;
    }

    public Collection<ExternalResourceDescriptor> locateExternalResourceName(Trace trace, Collection<Frame> frames) {
        if (ListUtil.size(frames) <= 0) {
            return Collections.emptyList();
        }

        List<ExternalResourceDescriptor> queueDescriptors = new ArrayList<ExternalResourceDescriptor>(frames.size());
        for (Frame cacheFrame : frames) {
            Operation op = cacheFrame.getOperation();
            String host = op.get("host", String.class, null);
            if (host != null) {
                String hashString = MD5NameGenerator.getName(host);
                String color = colorManager.getColor(op);

                ExternalResourceDescriptor descriptor =
                        new ExternalResourceDescriptor(cacheFrame, "server:" + hashString, host,
                                ExternalResourceType.OTHER.name(), "HadoopMapper",
                                host, 0, color, false);
                queueDescriptors.add(descriptor);
            }
        }

        return queueDescriptors;
    }
}