FilesTrackerExternalResourceAnalyzer.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.files.tracker;

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;
import com.springsource.insight.util.StringUtil;

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

    private FilesTrackerExternalResourceAnalyzer() {
        super(FilesTrackerDefinitions.TYPE);
    }

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

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

        List<ExternalResourceDescriptor> descriptors = new ArrayList<ExternalResourceDescriptor>(frames.size());
        for (Frame frame : frames) {
            Operation op = frame.getOperation();
            String path = op.get(FilesTrackerDefinitions.PATH_ATTR, String.class);
            if (StringUtil.isEmpty(path)) {
                continue;
            }

            String hashString = MD5NameGenerator.getName(path);
            String color = colorManager.getColor(op);
            ExternalResourceDescriptor desc =
                    new ExternalResourceDescriptor(frame,
                            FilesTrackerDefinitions.TYPE.getName() + ":" + hashString,
                            path,
                            ExternalResourceType.FILESTORE.name(),
                            FilesTrackerDefinitions.TYPE.getName(),
                            color, false);
            descriptors.add(desc);
        }

        return descriptors;
    }
}