/**
* Copyright 2011-2014 Asakusa Framework Team.
*
* 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.asakusafw.runtime.util.cache;
import static org.hamcrest.Matchers.*;
import static org.junit.Assert.*;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import org.apache.hadoop.fs.Path;
import org.junit.Test;
import com.asakusafw.runtime.util.cache.ConcurrentBatchFileCacheRepository.ExceptionHandler;
/**
* Test for {@link ConcurrentBatchFileCacheRepository}.
*/
public class ConcurrentBatchFileCacheRepositoryTest extends FileCacheRepositoryTestRoot {
/**
* simple case.
* @throws Exception if failed
*/
@Test
public void simple() throws Exception {
File source = put(folder.newFile(), "Hello, world!");
Map<File, File> results;
ExecutorService executor = Executors.newFixedThreadPool(1);
try {
BatchFileCacheRepository batch = new ConcurrentBatchFileCacheRepository(
new MockFileCacheRepository(folder.newFolder()), executor);
results = files(batch.resolve(Arrays.asList(path(source))));
} finally {
executor.shutdown();
}
assertThat(results.size(), is(1));
File target = results.get(source);
assertThat(target, is(notNullValue()));
assertThat(get(target), is("Hello, world!"));
assertThat(target, is(not(source)));
}
/**
* concurrent.
* @throws Exception if failed
*/
@Test
public void multiple() throws Exception {
List<File> sources = new ArrayList<File>();
List<Path> paths = new ArrayList<Path>();
for (int i = 0; i < 100; i++) {
File source = put(folder.newFile(), String.format("hello%02d", i));
sources.add(source);
paths.add(path(source));
}
Map<File, File> results;
ExecutorService executor = Executors.newFixedThreadPool(
Math.min(4, Runtime.getRuntime().availableProcessors()));
try {
BatchFileCacheRepository batch = new ConcurrentBatchFileCacheRepository(
new MockFileCacheRepository(folder.newFolder()), executor);
results = files(batch.resolve(paths));
} finally {
executor.shutdown();
}
assertThat(results.size(), is(sources.size()));
for (File source : sources) {
File target = results.get(source);
assertThat(target, is(notNullValue()));
assertThat(get(target), is(get(source)));
assertThat(target, is(not(source)));
}
}
/**
* Handles exception and returns an alternative.
* @throws Exception if failed
*/
@Test
public void exception_suppress() throws Exception {
File source = put(folder.newFile(), "Hello, world!");
final File alter = folder.newFile();
Map<File, File> results;
ExecutorService executor = Executors.newFixedThreadPool(1);
try {
BatchFileCacheRepository batch = new ConcurrentBatchFileCacheRepository(
new FileCacheRepository() {
@Override
public Path resolve(Path file) throws IOException, InterruptedException {
throw new IOException();
}
}, executor, new ExceptionHandler() {
@Override
public Path handle(Path path, IOException exception) throws IOException {
return path(alter);
}
});
results = files(batch.resolve(Arrays.asList(path(source))));
} finally {
executor.shutdown();
}
assertThat(results.size(), is(1));
assertThat(results.get(source), is(alter));
}
/**
* Handles exception and re-throw it.
* @throws Exception if failed
*/
@Test
public void exception_rethrow() throws Exception {
File source = put(folder.newFile(), "Hello, world!");
ExecutorService executor = Executors.newFixedThreadPool(1);
try {
BatchFileCacheRepository batch = new ConcurrentBatchFileCacheRepository(
new FileCacheRepository() {
@Override
public Path resolve(Path file) throws IOException, InterruptedException {
throw new IOException();
}
}, executor, new ExceptionHandler() {
@Override
public Path handle(Path path, IOException exception) throws IOException {
throw exception;
}
});
batch.resolve(Arrays.asList(path(source)));
fail();
} catch (IOException e) {
// ok.
} finally {
executor.shutdown();
}
}
/**
* Cancel executors.
* @throws Exception if failed
*/
@Test
public void cancel() throws Exception {
File source = put(folder.newFile(), "Hello, world!");
Map<File, File> results;
ExecutorService executor = Executors.newFixedThreadPool(1);
try {
BatchFileCacheRepository batch = new ConcurrentBatchFileCacheRepository(
new FileCacheRepository() {
@Override
public Path resolve(Path file) throws IOException, InterruptedException {
throw new InterruptedException();
}
}, executor);
results = files(batch.resolve(Arrays.asList(path(source))));
} finally {
executor.shutdown();
}
assertThat(results.size(), is(1));
assertThat(results.get(source), is(nullValue()));
}
}