org.apache.tajo.rule.base.CheckHadoopRuntimeVersionRule.java Source code

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Here is the source code for org.apache.tajo.rule.base.CheckHadoopRuntimeVersionRule.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.tajo.rule.base;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.io.IOUtils;
import org.apache.tajo.rule.*;
import org.apache.tajo.rule.EvaluationResult.EvaluationResultCode;
import org.apache.tajo.validation.Validators;

import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

@SelfDiagnosisRuleDefinition(category = "base", name = "CheckHadoopRuntimeVersionRule", priority = 0)
@SelfDiagnosisRuleVisibility.Public
public class CheckHadoopRuntimeVersionRule implements SelfDiagnosisRule {

    private static final Log LOG = LogFactory.getLog(CheckHadoopRuntimeVersionRule.class);
    private final Properties versionInfo;

    public CheckHadoopRuntimeVersionRule() {
        InputStream is = ClassLoader.getSystemResourceAsStream("common-version-info.properties");
        versionInfo = new Properties();
        try {
            versionInfo.load(is);
        } catch (IOException e) {
            LOG.warn(e.getMessage(), e);
        } finally {
            IOUtils.closeStream(is);
        }
    }

    private int[] getVersion() {
        int[] version = new int[0];
        String versionString = versionInfo.getProperty("version").split("-")[0];

        if (versionString != null && !versionString.isEmpty()) {
            Validators.patternMatch("\\d+\\.\\d+\\.\\d+.*").validate(versionString, true);

            String[] versionArray = versionString.split("\\.");
            version = new int[versionArray.length];
            for (int idx = 0; idx < versionArray.length; idx++) {
                version[idx] = Integer.parseInt(versionArray[idx]);
            }
        }

        return version;
    }

    private int compareVersion(int[] left, int[] right) {
        int returnValue = 0;
        int minLength = Math.min(left.length, right.length);

        for (int idx = 0; idx < minLength; idx++) {
            returnValue = (int) Math.signum(left[idx] - right[idx]);
            if (returnValue != 0) {
                break;
            }
        }

        if (returnValue == 0) {
            returnValue = (int) Math.signum(left.length - right.length);
        }
        return returnValue;
    }

    @Override
    public EvaluationResult evaluate(EvaluationContext context) {
        EvaluationResult evalResult = new EvaluationResult();

        try {
            int compared = compareVersion(getVersion(), new int[] { 2, 3, 0 });
            if (compared >= 0) {
                evalResult.setReturnCode(EvaluationResultCode.OK);
                evalResult.setMessage("Version test for hadoop common has passed.");
            } else {
                evalResult.setReturnCode(EvaluationResultCode.ERROR);
                evalResult.setMessage("Checking the version of hadoop common component has failed.\n"
                        + "Current version : " + versionInfo.getProperty("version"));
            }
        } catch (Exception e) {
            evalResult.setReturnCode(EvaluationResultCode.ERROR);
            evalResult.setThrowable(e);
            evalResult.setMessage("Checking the version of hadoop common component has failed.");
        }

        return evalResult;
    }

}