/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.camel.converter.stream;
import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import org.apache.camel.ContextTestSupport;
import org.apache.camel.Exchange;
import org.apache.camel.StreamCache;
import org.apache.camel.converter.IOConverter;
import org.apache.camel.impl.DefaultExchange;
import org.apache.camel.impl.DefaultUnitOfWork;
import org.apache.camel.spi.UnitOfWork;
import org.apache.camel.util.CollectionStringBuffer;
import org.apache.camel.util.IOHelper;
public class CachedOutputStreamTest extends ContextTestSupport {
private static final String TEST_STRING = "This is a test string and it has enough"
+ " aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa ";
private Exchange exchange;
protected void setUp() throws Exception {
super.setUp();
context.getProperties().put(CachedOutputStream.TEMP_DIR, "./target/cachedir");
context.getProperties().put(CachedOutputStream.THRESHOLD, "16");
deleteDirectory("./target/cachedir");
createDirectory("./target/cachedir");
exchange = new DefaultExchange(context);
UnitOfWork uow = new DefaultUnitOfWork(exchange);
exchange.setUnitOfWork(uow);
}
private static String toString(InputStream input) throws IOException {
BufferedReader reader = IOHelper.buffered(new InputStreamReader(input));
CollectionStringBuffer builder = new CollectionStringBuffer();
while (true) {
String line = reader.readLine();
if (line == null) {
return builder.toString();
}
builder.append(line);
}
}
public void testCacheStreamToFileAndCloseStream() throws IOException {
CachedOutputStream cos = new CachedOutputStream(exchange);
cos.write(TEST_STRING.getBytes("UTF-8"));
File file = new File("./target/cachedir");
String[] files = file.list();
assertEquals("we should have a temp file", files.length, 1);
assertTrue("The file name should start with cos" , files[0].startsWith("cos"));
StreamCache cache = cos.getStreamCache();
assertTrue("Should get the FileInputStreamCache", cache instanceof FileInputStreamCache);
String temp = toString((InputStream)cache);
((InputStream)cache).close();
assertEquals("we should have a temp file", files.length, 1);
assertEquals("Cached a wrong file", temp, TEST_STRING);
exchange.getUnitOfWork().done(exchange);
try {
cache.reset();
// The stream is closed, so the temp file is gone.
fail("we expect the exception here");
} catch (Exception exception) {
// do nothing
}
files = file.list();
assertEquals("we should have no temp file", files.length, 0);
}
public void testCacheStreamToFileCloseStreamBeforeDone() throws IOException {
CachedOutputStream cos = new CachedOutputStream(exchange);
cos.write(TEST_STRING.getBytes("UTF-8"));
File file = new File("./target/cachedir");
String[] files = file.list();
assertEquals("we should have a temp file", files.length, 1);
assertTrue("The file name should start with cos" , files[0].startsWith("cos"));
StreamCache cache = cos.getStreamCache();
assertTrue("Should get the FileInputStreamCache", cache instanceof FileInputStreamCache);
String temp = toString((InputStream)cache);
assertEquals("Cached a wrong file", temp, TEST_STRING);
cache.reset();
temp = toString((InputStream)cache);
assertEquals("Cached a wrong file", temp, TEST_STRING);
exchange.getUnitOfWork().done(exchange);
assertEquals("we should have a temp file", files.length, 1);
((InputStream)cache).close();
files = file.list();
assertEquals("we should have no temp file", files.length, 0);
}
public void testCacheStreamToMemory() throws IOException {
context.getProperties().put(CachedOutputStream.THRESHOLD, "1024");
CachedOutputStream cos = new CachedOutputStream(exchange);
cos.write(TEST_STRING.getBytes("UTF-8"));
File file = new File("./target/cachedir");
String[] files = file.list();
assertEquals("we should have no temp file", files.length, 0);
StreamCache cache = cos.getStreamCache();
assertTrue("Should get the InputStreamCache", cache instanceof InputStreamCache);
String temp = IOConverter.toString((InputStream)cache, null);
assertEquals("Cached a wrong file", temp, TEST_STRING);
}
public void testCacheStreamToMemoryAsDiskIsdisabled() throws IOException {
// -1 disables disk based cache
context.getProperties().put(CachedOutputStream.THRESHOLD, "-1");
CachedOutputStream cos = new CachedOutputStream(exchange);
cos.write(TEST_STRING.getBytes("UTF-8"));
File file = new File("./target/cachedir");
String[] files = file.list();
assertEquals("we should have no temp file", files.length, 0);
StreamCache cache = cos.getStreamCache();
assertTrue("Should get the InputStreamCache", cache instanceof InputStreamCache);
String temp = IOConverter.toString((InputStream)cache, null);
assertEquals("Cached a wrong file", temp, TEST_STRING);
exchange.getUnitOfWork().done(exchange);
}
}