/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2013, Red Hat, Inc., and individual contributors
 * as indicated by the @author tags. See the copyright.txt file in the
 * distribution for a full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.jboss.as.test.integration.batch.chunk;

import java.net.URL;
import java.util.Properties;
import java.util.concurrent.TimeUnit;
import javax.batch.operations.JobOperator;
import javax.batch.operations.NoSuchJobExecutionException;
import javax.batch.runtime.BatchRuntime;
import javax.batch.runtime.BatchStatus;
import javax.batch.runtime.JobExecution;
import javax.inject.Inject;

import org.jboss.arquillian.container.test.api.Deployment;
import org.jboss.arquillian.container.test.api.RunAsClient;
import org.jboss.arquillian.junit.Arquillian;
import org.jboss.arquillian.test.api.ArquillianResource;
import org.jboss.as.arquillian.container.ManagementClient;
import org.jboss.as.controller.client.helpers.Operations;
import org.jboss.as.test.integration.batch.common.AbstractBatchTestCase;
import org.jboss.as.test.integration.batch.common.CountingItemWriter;
import org.jboss.as.test.integration.batch.common.JobExecutionMarshaller;
import org.jboss.as.test.integration.batch.common.StartBatchServlet;
import org.jboss.as.test.shared.TimeoutUtil;
import org.jboss.shrinkwrap.api.asset.StringAsset;
import org.jboss.shrinkwrap.api.spec.WebArchive;
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;

/**
 * @author <a href="mailto:jperkins@redhat.com">James R. Perkins</a>
 */
@RunWith(Arquillian.class)
public class ChunkPartitionTestCase extends AbstractBatchTestCase {


    @ArquillianResource
    private ManagementClient managementClient;

    @Inject
    private CountingItemWriter countingItemWriter;

    @Deployment
    public static WebArchive createDeployment() {
        return createDefaultWar("batch-chunk-partition.war", ChunkPartitionTestCase.class.getPackage(), "chunkPartition.xml", "chunk-suspend.xml")
                .addPackage(ChunkPartitionTestCase.class.getPackage())
                .addClass(Operations.class)
                .addAsResource(new StringAsset("Dependencies: org.jboss.dmr, org.jboss.as.controller\n"), "META-INF/MANIFEST.MF");
    }

    @RunAsClient
    @Test
    public void chunks(@ArquillianResource final URL url) throws Exception {
        for (int i = 10; i >= 8; i--) {
            final UrlBuilder builder = UrlBuilder.of(url, "start");
            builder.addParameter(StartBatchServlet.JOB_XML_PARAMETER, "chunkPartition");
            builder.addParameter("thread.count", i);
            builder.addParameter("writer.sleep.time", 100);
            final String result = performCall(builder.build());
            final JobExecution jobExecution = JobExecutionMarshaller.unmarshall(result);


            Assert.assertEquals(BatchStatus.COMPLETED, jobExecution.getBatchStatus());
            // final String exitStatus = stepExecution0.getExitStatus();
            // System.out.printf("Step exit status: %s%n", exitStatus);
            // Assert.assertTrue(exitStatus.startsWith("PASS"));
        }

        final UrlBuilder builder = UrlBuilder.of(url, "start");
        builder.addParameter(StartBatchServlet.JOB_XML_PARAMETER, "chunkPartition");
        builder.addParameter("thread.count", 1);
        builder.addParameter("skip.thread.check", "true");
        builder.addParameter("writer.sleep.time", 0);
        final String result = performCall(builder.build());
        final JobExecution jobExecution = JobExecutionMarshaller.unmarshall(result);
        Assert.assertEquals(BatchStatus.COMPLETED, jobExecution.getBatchStatus());
    }

    @Test
    public void testSuspend() throws Exception {
        try {
            final Properties jobProperties = new Properties();
            jobProperties.setProperty("reader.end", "10");
            final JobOperator jobOperator = BatchRuntime.getJobOperator();

            // Start the first job
            long executionId = jobOperator.start("chunk-suspend", jobProperties);

            JobExecution jobExecution = jobOperator.getJobExecution(executionId);

            // Wait until the job is complete for a maximum of 5 seconds
            waitForTermination(jobExecution, 5);
            Assert.assertEquals(BatchStatus.COMPLETED, jobExecution.getBatchStatus());

            // Check that count
            Assert.assertEquals(10, countingItemWriter.getWrittenItemSize());

            // Suspend the server
            managementClient.getControllerClient().execute(Operations.createOperation("suspend"));

            // Submit another job which should be queued, should be safe with an InMemoryJobRepository (the default)
            executionId = jobOperator.start("chunk-suspend", jobProperties);

            // The job should not exist yet as the server is suspended
            try {
                jobOperator.getJobExecution(executionId);
            } catch (NoSuchJobExecutionException expected) {
                Assert.fail("Job should not exist as the server is suspended: " + executionId);
            }

            // Resume the server which should kick of queued jobs
            managementClient.getControllerClient().execute(Operations.createOperation("resume"));

            // Get the execution
            jobExecution = jobOperator.getJobExecution(executionId);

            // Wait until the job is complete for a maximum of 5 seconds
            waitForTermination(jobExecution, 5);
            Assert.assertEquals(BatchStatus.COMPLETED, jobExecution.getBatchStatus());

            // Check that count
            Assert.assertEquals(20, countingItemWriter.getWrittenItemSize());
        } finally {
            managementClient.getControllerClient().execute(Operations.createOperation("resume"));
        }
    }

    private static void waitForTermination(final JobExecution jobExecution, final int timeout) {
        long waitTimeout = TimeoutUtil.adjust(timeout * 1000);
        long sleep = 100L;
        while (true) {
            switch (jobExecution.getBatchStatus()) {
                case STARTED:
                case STARTING:
                case STOPPING:
                    try {
                        TimeUnit.MILLISECONDS.sleep(sleep);
                    } catch (InterruptedException e) {
                        throw new RuntimeException(e);
                    }
                    waitTimeout -= sleep;
                    sleep = Math.max(sleep / 2, 100L);
                    break;
                default:
                    return;
            }
            if (waitTimeout <= 0) {
                throw new IllegalStateException("Batch job did not complete within allotted time.");
            }
        }
    }

}
