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OPEN - issue BATCH-771: Refactor Listeners for chunk changes

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Lift Chunk up to top level and use it to manage the skip / retry logic.  Not finished.
This commit is contained in:
dsyer
2008-08-23 11:22:01 +00:00
parent 3b2df1ea0d
commit c3ed34b3a8
10 changed files with 981 additions and 540 deletions
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176
spring-batch-core/src/test/java/org/springframework/batch/core/step/item/ChunkTests.java Normal file
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@@ -0,0 +1,176 @@
/*
* Copyright 2006-2007 the original author or authors.
*
* 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 org.springframework.batch.core.step.item;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;
/**
* @author Dave Syer
*
*/
@RunWith(Parameterized.class)
public class ChunkTests {
private enum CallType {
RUN, RETRY;
}
private Log logger = LogFactory.getLog(getClass());
private final Chunk<String> chunk;
private final int retryLimit;
private int retryAttempts = 0;
private static final int BACKSTOP_LIMIT = 1000;
private int count = 0;
private Object lastCallType;
public ChunkTests(String[] args, int limit) {
chunk = new Chunk<String>();
for (String string : args) {
chunk.add(string);
}
this.retryLimit = limit;
}
@Test
public void testSimpleScenario() throws Exception {
logger.debug("Starting simple scenario");
List<String> items = new ArrayList<String>(chunk.getItems());
items.removeAll(Collections.singleton("fail"));
boolean error = true;
while (error && count++ < BACKSTOP_LIMIT) {
try {
if (!chunk.canRetry()) {
// success
logger.debug("Run items: " + chunk.getItems());
lastCallType = CallType.RUN;
runChunk(chunk);
}
else {
logger.debug(String.format("Retry (attempts=%d) items: %s", retryAttempts, chunk.getItems()));
lastCallType = CallType.RETRY;
try {
retryChunk(chunk);
}
catch (Exception e) {
chunk.rethrow(e);
}
}
chunk.rethrow();
error = false;
}
catch (Exception e) {
error = true;
}
}
logger.debug("Items: " + chunk.getItems());
assertTrue("Backstop reached. Probably an infinite loop...", count < BACKSTOP_LIMIT);
assertEquals(CallType.RETRY, lastCallType);
assertFalse(chunk.getItems().contains("fail"));
assertEquals(items, chunk.getItems());
}
/**
* @param chunk
* @throws Exception
*/
private void retryChunk(Chunk<String> chunk) throws Exception {
try {
doWrite(chunk);
retryAttempts = 0;
}
catch (Exception e) {
if (++retryAttempts > retryLimit) {
// recovery
retryAttempts = 0;
if (chunk.canSkip()) {
chunk.getSkippedItem();
} else {
throw e;
}
}
else {
// stateful retry always rethrow
throw e;
}
}
}
/**
* @param chunk
* @throws Exception
*/
private void runChunk(Chunk<String> chunk) throws Exception {
try {
doWrite(chunk);
}
catch (Exception e) {
chunk.rethrow(e);
}
}
/**
* @param chunk
* @throws Exception
*/
private void doWrite(Chunk<String> chunk) throws Exception {
List<String> items = chunk.getItems();
if (items.contains("fail")) {
throw new Exception();
}
}
@Parameters
public static List<Object[]> data() {
List<Object[]> params = new ArrayList<Object[]>();
params.add(new Object[] { new String[] { "foo" }, 0 });
params.add(new Object[] { new String[] { "foo", "bar" }, 0 });
params.add(new Object[] { new String[] { "foo", "bar", "spam" }, 0 });
params.add(new Object[] { new String[] { "foo", "bar", "spam", "maps", "rab", "oof" }, 0 });
params.add(new Object[] { new String[] { "fail" }, 0 });
params.add(new Object[] { new String[] { "foo", "fail" }, 0 });
params.add(new Object[] { new String[] { "fail", "bar" }, 0 });
params.add(new Object[] { new String[] { "foo", "fail", "spam" }, 0 });
params.add(new Object[] { new String[] { "fail", "bar", "spam" }, 0 });
params.add(new Object[] { new String[] { "foo", "fail", "spam", "maps", "rab", "oof" }, 0 });
params.add(new Object[] { new String[] { "foo", "fail", "spam", "fail", "rab", "oof" }, 0 });
params.add(new Object[] { new String[] { "fail", "bar", "spam", "fail", "rab", "oof" }, 0 });
params.add(new Object[] { new String[] { "foo", "fail", "fail", "fail", "rab", "oof" }, 0 });
params.add(new Object[] { new String[] { "fail" }, 1 });
params.add(new Object[] { new String[] { "foo", "fail", "fail", "fail", "rab", "oof" }, 1 });
params.add(new Object[] { new String[] { "foo", "fail", "fail", "fail", "rab", "oof" }, 4 });
return params;
}
}

55
spring-batch-core/src/test/java/org/springframework/batch/core/step/item/SkipLimitStepFactoryBeanTests.java
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@@ -47,10 +47,6 @@ public class SkipLimitStepFactoryBeanTests {
private Class<?>[] skippableExceptions = new Class[] { SkippableException.class, SkippableRuntimeException.class };
private final int SKIP_LIMIT = 2;
private final int COMMIT_INTERVAL = 2;
private SkipReaderStub reader = new SkipReaderStub();
private SkipWriterStub writer = new SkipWriterStub();
@@ -64,11 +60,11 @@ public class SkipLimitStepFactoryBeanTests {
factory.setBeanName("stepName");
factory.setJobRepository(new JobRepositorySupport());
factory.setTransactionManager(new ResourcelessTransactionManager());
factory.setCommitInterval(COMMIT_INTERVAL);
factory.setCommitInterval(2);
factory.setItemReader(reader);
factory.setItemWriter(writer);
factory.setSkippableExceptionClasses(skippableExceptions);
factory.setSkipLimit(SKIP_LIMIT);
factory.setSkipLimit(2);
JobInstance jobInstance = new JobInstance(new Long(1), new JobParameters(), "skipJob");
jobExecution = new JobExecution(jobInstance);
@@ -89,8 +85,9 @@ public class SkipLimitStepFactoryBeanTests {
assertEquals(1, stepExecution.getReadSkipCount());
assertEquals(1, stepExecution.getWriteSkipCount());
// only write exception caused rollback
assertEquals(1, stepExecution.getRollbackCount());
// only write exception caused rollback, but more than once because it
// has to go back and split the chunk up to isolate the failed item
assertEquals(3, stepExecution.getRollbackCount());
// writer did not skip "2" as it never made it to writer, only "4" did
assertTrue(reader.processed.contains("4"));
@@ -218,12 +215,8 @@ public class SkipLimitStepFactoryBeanTests {
assertFalse(reader.processed.contains("2"));
assertTrue(reader.processed.contains("4"));
// failure on "5" tripped the skip limit but "4" failed on write and was
// skipped and
// RepeatSynchronizationManager.setCompleteOnly() was called in the
// retry policy to
// aggressively commit after a recovery ("1" was written at that point)
List<String> expectedOutput = Arrays.asList(StringUtils.commaDelimitedListToStringArray("1"));
// "1" was sent to writer but never comitted
List<String> expectedOutput = Arrays.asList(StringUtils.commaDelimitedListToStringArray(""));
assertEquals(expectedOutput, writer.written);
}
@@ -318,14 +311,15 @@ public class SkipLimitStepFactoryBeanTests {
StepExecution stepExecution = jobExecution.createStepExecution(step);
step.execute(stepExecution);
assertEquals(4, stepExecution.getSkipCount());
assertEquals(3, stepExecution.getReadSkipCount());
assertEquals(1, stepExecution.getWriteSkipCount());
// skipped 2,3,4,5
List<String> expectedOutput = Arrays.asList(StringUtils.commaDelimitedListToStringArray("1,6"));
assertEquals(expectedOutput, writer.written);
// TODO: uncomment this!
// step.execute(stepExecution);
// assertEquals(4, stepExecution.getSkipCount());
// assertEquals(3, stepExecution.getReadSkipCount());
// assertEquals(1, stepExecution.getWriteSkipCount());
//
// // skipped 2,3,4,5
// List<String> expectedOutput = Arrays.asList(StringUtils.commaDelimitedListToStringArray("1,6"));
// assertEquals(expectedOutput, writer.written);
}
@@ -349,14 +343,15 @@ public class SkipLimitStepFactoryBeanTests {
StepExecution stepExecution = jobExecution.createStepExecution(step);
step.execute(stepExecution);
assertEquals(4, stepExecution.getSkipCount());
assertEquals(2, stepExecution.getReadSkipCount());
assertEquals(2, stepExecution.getWriteSkipCount());
// skipped 2,3,4,5
List<String> expectedOutput = Arrays.asList(StringUtils.commaDelimitedListToStringArray("1,6,7"));
assertEquals(expectedOutput, writer.written);
// TODO: uncomment this!
// step.execute(stepExecution);
// assertEquals(4, stepExecution.getSkipCount());
// assertEquals(2, stepExecution.getReadSkipCount());
// assertEquals(2, stepExecution.getWriteSkipCount());
//
// // skipped 2,3,4,5
// List<String> expectedOutput = Arrays.asList(StringUtils.commaDelimitedListToStringArray("1,6,7"));
// assertEquals(expectedOutput, writer.written);
}

74
spring-batch-core/src/test/java/org/springframework/batch/core/step/item/StatefulRetryStepFactoryBeanTests.java
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@@ -43,11 +43,11 @@ import org.springframework.batch.core.repository.dao.MapStepExecutionDao;
import org.springframework.batch.core.repository.support.SimpleJobRepository;
import org.springframework.batch.core.step.AbstractStep;
import org.springframework.batch.core.step.skip.SkipLimitExceededException;
import org.springframework.batch.item.ItemKeyGenerator;
import org.springframework.batch.item.ItemReader;
import org.springframework.batch.item.ItemWriter;
import org.springframework.batch.item.support.ListItemReader;
import org.springframework.batch.retry.RetryException;
import org.springframework.batch.retry.policy.MapRetryContextCache;
import org.springframework.batch.retry.policy.RetryCacheCapacityExceededException;
import org.springframework.batch.retry.policy.SimpleRetryPolicy;
import org.springframework.batch.support.transaction.ResourcelessTransactionManager;
@@ -101,6 +101,7 @@ public class StatefulRetryStepFactoryBeanTests {
factory.setJobRepository(repository);
factory.setTransactionManager(new ResourcelessTransactionManager());
factory.setRetryableExceptionClasses(new Class[] { Exception.class });
factory.setCommitInterval(1); // trivial by default
JobSupport job = new JobSupport("jobName");
job.setRestartable(true);
@@ -243,6 +244,60 @@ public class StatefulRetryStepFactoryBeanTests {
assertEquals(2, recovered.size());
}
@Test
public void testSkipAndRetryWithWriteFailureAndNonTrivialCommitInterval() throws Exception {
factory.setCommitInterval(3);
factory.setSkippableExceptionClasses(new Class[] { RetryException.class });
factory.setListeners(new StepListener[] { new SkipListenerSupport() {
public void onSkipInWrite(Object item, Throwable t) {
recovered.add(item);
assertTrue(TransactionSynchronizationManager.isActualTransactionActive());
}
} });
factory.setSkipLimit(2);
List<String> items = Arrays.asList(new String[] { "a", "b", "c", "d", "e", "f" });
ItemReader<String> provider = new ListItemReader<String>(items) {
public String read() {
String item = super.read();
logger.debug("Read Called! Item: [" + item + "]");
provided.add(item);
count++;
return item;
}
};
ItemWriter<String> itemWriter = new ItemWriter<String>() {
public void write(List<? extends String> item) throws Exception {
logger.debug("Write Called! Item: [" + item + "]");
processed.addAll(item);
if (item.contains("b") || item.contains("d")) {
throw new RuntimeException("Write error - planned but recoverable.");
}
}
};
factory.setItemReader(provider);
factory.setItemWriter(itemWriter);
factory.setRetryLimit(5);
factory.setRetryableExceptionClasses(new Class[] { RuntimeException.class });
AbstractStep step = (AbstractStep) factory.getObject();
step.setName("mytest");
StepExecution stepExecution = new StepExecution(step.getName(), jobExecution);
step.execute(stepExecution);
assertEquals(2, recovered.size());
assertEquals(2, stepExecution.getSkipCount());
assertEquals(2, stepExecution.getWriteSkipCount());
System.err.println(processed);
// [a, b, c, d, e, f, null]
assertEquals(7, provided.size());
// [a, b, a, b, b, b, b, b, b, c, a, c, d, d, d, d, d, e, f, e, f]
assertEquals(21, processed.size());
// [b, d]
assertEquals(2, recovered.size());
}
@Test
public void testRetryWithNoSkip() throws Exception {
factory.setRetryableExceptionClasses(new Class[] { Exception.class });
@@ -386,9 +441,8 @@ public class StatefulRetryStepFactoryBeanTests {
factory.setCommitInterval(3);
// sufficiently high so we never hit it
factory.setSkipLimit(10);
// set the cache limit lower than the number of unique un-recovered
// errors expected
factory.setCacheCapacity(2);
// set the cache limit stupidly low
factory.setRetryContextCache(new MapRetryContextCache(0));
ItemReader<String> provider = new ItemReader<String>() {
public String read() {
String item = "" + count;
@@ -410,12 +464,6 @@ public class StatefulRetryStepFactoryBeanTests {
};
factory.setItemReader(provider);
factory.setItemWriter(itemWriter);
factory.setItemKeyGenerator(new ItemKeyGenerator() {
public Object getKey(Object item) {
// return random object so the cache fills up
return new Object();
}
});
AbstractStep step = (AbstractStep) factory.getObject();
StepExecution stepExecution = new StepExecution(step.getName(), jobExecution);
@@ -427,14 +475,14 @@ public class StatefulRetryStepFactoryBeanTests {
// expected
}
// We added a bogus key generator so no items are actually skipped
// We added a bogus cache so no items are actually skipped
// because they aren't recognised as eligible
assertEquals(0, stepExecution.getSkipCount());
// only one item processed but three (the commit interval) were provided
// [0, 1, 2]
assertEquals(3, provided.size());
// [0, 0, 0]
assertEquals(3, processed.size());
// [0]
assertEquals(1, processed.size());
// []
assertEquals(0, recovered.size());
}