org.apache.geode.internal.statistics.StatUtils.java Source code

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Here is the source code for org.apache.geode.internal.statistics.StatUtils.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
 * agreements. See the NOTICE file distributed with this work for additional information regarding
 * copyright ownership. The ASF licenses this file to You 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 org.apache.geode.internal.statistics;

import static org.assertj.core.api.Assertions.*;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;

import org.apache.commons.lang.StringUtils;

import org.apache.geode.internal.SystemAdmin.StatSpec;
import org.apache.geode.internal.statistics.StatArchiveReader.ResourceInst;
import org.apache.geode.internal.statistics.StatArchiveReader.StatValue;

/**
 * @since Geode 1.0
 */
public class StatUtils {

    /**
     * final File expectedStatArchiveFile = new File(TestUtil.getResourcePath(getClass(),
     * "StatArchiveWriterReaderJUnitTest_" + this.testName.getMethodName() + "_expected.gfs"));
     */
    public static void compareStatArchiveFiles(final File expectedStatArchiveFile, final File actualStatArchiveFile)
            throws IOException {
        assertThat(expectedStatArchiveFile).exists();
        assertThat(actualStatArchiveFile.length()).isEqualTo(expectedStatArchiveFile.length());

        assertThat(readBytes(actualStatArchiveFile)).isEqualTo(readBytes(expectedStatArchiveFile));
    }

    public static Set<ResourceInst> findResourceInsts(final File archiveFile, final String specString)
            throws IOException {
        Set<ResourceInst> resourceInsts = new HashSet<>();

        if (StringUtils.isNotEmpty(specString)) {
            addResourceInstsToSet(archiveFile, specString, resourceInsts);
        } else {
            addResourceInstsToSet(archiveFile, resourceInsts);
        }

        return resourceInsts;
    }

    private static void addResourceInstsToSet(final File archiveFile, final Set<ResourceInst> resourceInsts)
            throws IOException {
        StatArchiveReader reader = new StatArchiveReader(new File[] { archiveFile }, new StatSpec[] {}, true);

        for (Iterator<ResourceInst> it = reader.getResourceInstList().iterator(); it.hasNext();) {
            resourceInsts.add(it.next());
        }
    }

    private static void addResourceInstsToSet(final File archiveFile, final String specString,
            final Set<ResourceInst> resourceInsts) throws IOException {
        StatSpec statSpec = new StatSpec(specString);

        StatArchiveReader reader = new StatArchiveReader(new File[] { archiveFile }, new StatSpec[] { statSpec },
                true);
        StatValue[] statValues = reader.matchSpec(statSpec);

        for (StatValue statValue : statValues) {
            for (ResourceInst resourceInst : statValue.getResources()) {
                resourceInsts.add(resourceInst);
            }
        }
    }

    private static byte[] readBytes(File file) throws IOException {
        int byteCount = (int) file.length();

        byte[] input = new byte[byteCount];

        URL url = file.toURL();
        assertThat(url).isNotNull();

        InputStream is = url.openStream();
        assertThat(is).isNotNull();

        BufferedInputStream bis = new BufferedInputStream(is);
        int bytesRead = bis.read(input);
        bis.close();

        assertThat(bytesRead).isEqualTo(byteCount);
        return input;
    }
}