/***********************************************************************************************************************
* Copyright (C) 2010-2013 by the Stratosphere project (http://stratosphere.eu)
*
* 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 eu.stratosphere.api.java.record.io;
import java.io.IOException;
import junit.framework.Assert;
import org.junit.Before;
import org.junit.Test;
import eu.stratosphere.api.common.io.statistics.BaseStatistics;
import eu.stratosphere.configuration.Configuration;
import eu.stratosphere.core.io.GenericInputSplit;
import eu.stratosphere.types.IntValue;
import eu.stratosphere.types.Record;
import eu.stratosphere.util.OperatingSystem;
public class ExternalProcessFixedLengthInputFormatTest {
private ExternalProcessFixedLengthInputFormat<ExternalProcessInputSplit> format;
private final String neverEndingCommand = "cat /dev/urandom";
private final String thousandRecordsCommand = "dd if=/dev/zero bs=8 count=1000";
private final String incompleteRecordsCommand = "dd if=/dev/zero bs=7 count=2";
private final String failingCommand = "ls /I/do/not/exist";
@Before
public void prepare() {
format = new MyExternalProcessTestInputFormat();
}
@Test
public void testOpen() {
if(OperatingSystem.isWindows()) {
return;
}
Configuration config = new Configuration();
config.setInteger(ExternalProcessFixedLengthInputFormat.RECORDLENGTH_PARAMETER_KEY, 8);
ExternalProcessInputSplit split = new ExternalProcessInputSplit(1, 1, this.neverEndingCommand);
boolean processDestroyed = false;
try {
format.configure(config);
format.open(split);
String[] cmd = {"/bin/sh","-c","ps aux | grep -v grep | grep \"cat /dev/urandom\" | wc -l"};
byte[] wcOut = new byte[128];
Process p = Runtime.getRuntime().exec(cmd);
p.getInputStream().read(wcOut);
int pCnt = Integer.parseInt(new String(wcOut).trim());
Assert.assertTrue(pCnt > 0);
format.close();
} catch (IOException e) {
Assert.fail();
} catch (RuntimeException e) {
if(e.getMessage().equals("External process was destroyed although stream was not fully read.")) {
processDestroyed = true;
}
} finally {
Assert.assertTrue(processDestroyed);
}
}
@Test
public void testCheckExitCode() {
if(OperatingSystem.isWindows()) {
return;
}
Configuration config = new Configuration();
config.setInteger(ExternalProcessFixedLengthInputFormat.RECORDLENGTH_PARAMETER_KEY, 8);
ExternalProcessInputSplit split = new ExternalProcessInputSplit(1, 1, failingCommand);
format.configure(config);
boolean invalidExitCode = false;
try {
format.open(split);
format.waitForProcessToFinish();
format.close();
} catch (IOException e) {
Assert.fail();
} catch (InterruptedException e) {
Assert.fail();
} catch (RuntimeException e) {
if(e.getMessage().startsWith("External process did not finish with an allowed exit code:")) {
invalidExitCode = true;
}
}
Assert.assertTrue(invalidExitCode);
invalidExitCode = false;
config.setString(ExternalProcessInputFormat.ALLOWEDEXITCODES_PARAMETER_KEY,"0,1,2");
format.configure(config);
try {
format.open(split);
// wait for process to start...
Thread.sleep(100);
format.close();
} catch (IOException e) {
Assert.fail();
} catch (InterruptedException e) {
Assert.fail();
} catch (RuntimeException e) {
if(e.getMessage().startsWith("External process did not finish with an allowed exit code:")) {
invalidExitCode = true;
}
}
Assert.assertTrue(!invalidExitCode);
}
@Test
public void testUserCodeTermination() {
if(OperatingSystem.isWindows()) {
return;
}
Configuration config = new Configuration();
config.setInteger(ExternalProcessFixedLengthInputFormat.RECORDLENGTH_PARAMETER_KEY, 8);
config.setInteger(MyExternalProcessTestInputFormat.FAILCOUNT_PARAMETER_KEY, 100);
ExternalProcessInputSplit split = new ExternalProcessInputSplit(1, 1, this.neverEndingCommand);
Record record = new Record();
boolean userException = false;
boolean processDestroyed = false;
try {
format.configure(config);
format.open(split);
while(!format.reachedEnd()) {
try {
format.nextRecord(record);
} catch(RuntimeException re) {
userException = true;
break;
}
}
format.close();
} catch (IOException e) {
Assert.fail();
} catch (RuntimeException e) {
if(e.getMessage().equals("External process was destroyed although stream was not fully read.")) {
processDestroyed = true;
}
} finally {
Assert.assertTrue(userException && processDestroyed);
}
}
@Test
public void testReadStream() {
if(OperatingSystem.isWindows()) {
return;
}
Configuration config = new Configuration();
config.setInteger(ExternalProcessFixedLengthInputFormat.RECORDLENGTH_PARAMETER_KEY, 8);
ExternalProcessInputSplit split = new ExternalProcessInputSplit(1, 1, this.thousandRecordsCommand);
Record record = new Record();
int cnt = 0;
try {
format.configure(config);
format.open(split);
while(!format.reachedEnd()) {
if (format.nextRecord(record) != null) {
cnt++;
}
}
format.close();
} catch (IOException e) {
Assert.fail();
} catch (RuntimeException e) {
Assert.fail(e.getMessage());
}
Assert.assertTrue(cnt == 1000);
}
@Test
public void testReadInvalidStream() {
if(OperatingSystem.isWindows()) {
return;
}
Configuration config = new Configuration();
config.setInteger(ExternalProcessFixedLengthInputFormat.RECORDLENGTH_PARAMETER_KEY, 8);
ExternalProcessInputSplit split = new ExternalProcessInputSplit(1, 1, this.incompleteRecordsCommand);
Record record = new Record();
boolean incompleteRecordDetected = false;
@SuppressWarnings("unused")
int cnt = 0;
try {
format.configure(config);
format.open(split);
while(!format.reachedEnd()) {
if (format.nextRecord(record) != null) {
cnt++;
}
}
format.close();
} catch (IOException e) {
Assert.fail();
} catch (RuntimeException e) {
if(e.getMessage().equals("External process produced incomplete record")) {
incompleteRecordDetected = true;
} else {
Assert.fail(e.getMessage());
}
}
Assert.assertTrue(incompleteRecordDetected);
}
private final class MyExternalProcessTestInputFormat extends ExternalProcessFixedLengthInputFormat<ExternalProcessInputSplit> {
private static final long serialVersionUID = 1L;
public static final String FAILCOUNT_PARAMETER_KEY = "test.failingCount";
private long cnt = 0;
private int failCnt;
@Override
public void configure(Configuration parameters) {
super.configure(parameters);
failCnt = parameters.getInteger(FAILCOUNT_PARAMETER_KEY, Integer.MAX_VALUE);
}
@Override
public boolean readBytes(Record record, byte[] bytes, int startPos) {
if(cnt == failCnt) {
throw new RuntimeException("This is a test exception!");
}
int v1 = 0;
v1 = v1 | (0xFF & bytes[startPos+0]);
v1 = (v1 << 8) | (0xFF & bytes[startPos+1]);
v1 = (v1 << 8) | (0xFF & bytes[startPos+2]);
v1 = (v1 << 8) | (0xFF & bytes[startPos+3]);
int v2 = 0;
v2 = v2 | (0xFF & bytes[startPos+4]);
v2 = (v2 << 8) | (0xFF & bytes[startPos+5]);
v2 = (v2 << 8) | (0xFF & bytes[startPos+6]);
v2 = (v2 << 8) | (0xFF & bytes[startPos+7]);
record.setField(0,new IntValue(v1));
record.setField(1,new IntValue(v2));
cnt++;
return true;
}
@Override
public ExternalProcessInputSplit[] createInputSplits(int minNumSplits)
throws IOException {
return null;
}
@Override
public Class<GenericInputSplit> getInputSplitType() {
return GenericInputSplit.class;
}
@Override
public BaseStatistics getStatistics(BaseStatistics cachedStatistics) {
return null;
}
}
}