com.google.cloud.tools.maven.it.verifier.TailingVerifier.java Source code

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Here is the source code for com.google.cloud.tools.maven.it.verifier.TailingVerifier.java

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/*
 * Copyright (C) 2016 Google Inc.
 *
 * 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.google.cloud.tools.maven.it.verifier;

import org.apache.commons.io.input.Tailer;
import org.apache.commons.io.input.TailerListener;
import org.apache.commons.io.input.TailerListenerAdapter;
import org.apache.maven.it.VerificationException;
import org.apache.maven.it.Verifier;

import java.io.File;
import java.io.IOException;

public class TailingVerifier extends Verifier {

    public static final int TAIL_DELAY_MILLIS = 1000;

    private String testName;

    public TailingVerifier(String testName, String basedir) throws VerificationException {
        super(basedir, true);
        this.testName = testName;
        setLogFileName(testName + ".txt");
        setAutoclean(false);

        startTailingLog();
    }

    private void startTailingLog() {
        TailerListener listener = new TailerListenerAdapter() {
            @Override
            public void handle(String line) {
                System.out.println(testName + ": " + line);
            }
        };

        // Tail the log
        File file = new File(getBasedir() + File.separator + getLogFileName());
        try {
            if (file.exists()) {
                file.delete();
            }
            file.createNewFile();
        } catch (IOException e) {
            e.printStackTrace();
        }
        Tailer tailer = new Tailer(file, listener, TAIL_DELAY_MILLIS);
        Thread thread = new Thread(tailer);
        thread.setDaemon(true);
        thread.start();
    }

}