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/*
* 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 com.epam.datalab.backendapi.core.response.folderlistener;
import com.epam.datalab.backendapi.core.FileHandlerCallback;
import com.epam.datalab.util.ServiceUtils;
import org.junit.Test;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.concurrent.ExecutionException;
import static org.junit.Assert.assertEquals;
public class FolderListenerTest {
private final long maxWaitTimeoutMillis = 30000;
private final long timeoutMillis = 2000;
private final long fileLengthCheckDelay = 1000;
private boolean handleResult = true;
public class FileHandler implements FileHandlerCallback {
private final String uuid;
public FileHandler(String uuid) {
this.uuid = uuid;
}
@Override
public String getUUID() {
return uuid;
}
@Override
public boolean checkUUID(String uuid) {
return this.uuid.equals(uuid);
}
@Override
public boolean handle(String fileName, byte[] content) throws Exception {
if (!handleResult) {
throw new Exception("Test exception");
}
return handleResult;
}
@Override
public void handleError(String errorMessage) {
System.out.println("handleError called for UUID " + getUUID());
}
@Override
public String getUser() {
return null;
}
}
private String getFileName(String uuid) {
return "FolderListenerTest_" + uuid + ".json";
}
private String getDirectory() {
return ServiceUtils.getUserDir();
}
private void removeFile(String uuid) throws IOException {
File file = new File(getDirectory(), getFileName(uuid));
if (file.exists()) {
file.delete();
}
}
private void createFile(String uuid) throws IOException {
File file = new File(getDirectory(), getFileName(uuid));
removeFile(uuid);
FileWriter f = new FileWriter(file);
f.write("test");
f.flush();
f.close();
}
private void processFile(WatchItem item) throws InterruptedException, IOException {
long expiredTime = System.currentTimeMillis() + maxWaitTimeoutMillis;
while (!FolderListener.getListeners().isEmpty() &&
!FolderListener.getListeners().get(0).isListen()) {
if (expiredTime < System.currentTimeMillis()) {
throw new InterruptedException("Timeout has been expired");
}
Thread.sleep(100);
}
expiredTime = System.currentTimeMillis() + maxWaitTimeoutMillis;
while (item.getFuture() == null) {
if (expiredTime < System.currentTimeMillis()) {
throw new InterruptedException("Timeout has been expired");
}
Thread.sleep(100);
}
}
@Test
public void listen() throws InterruptedException, ExecutionException, IOException {
Integer uuid = 1;
FileHandlerCallback fHandler;
WatchItem item;
handleResult = false;
fHandler = new FileHandler(uuid.toString());
item = FolderListener.listen(getDirectory(), fHandler, timeoutMillis, fileLengthCheckDelay, null);
FolderListener listener = FolderListener.getListeners().get(0);
assertEquals(false, listener.isListen());
assertEquals(true, listener.isAlive());
System.out.println("TEST process FALSE");
uuid = 2;
createFile(uuid.toString());
fHandler = new FileHandler(uuid.toString());
item = FolderListener.listen(getDirectory(), fHandler, timeoutMillis, fileLengthCheckDelay, null);
processFile(item);
assertEquals(true, listener.isListen());
assertEquals(false, item.getFutureResultSync());
assertEquals(false, item.getFutureResult());
System.out.println("TEST process TRUE");
uuid = 3;
handleResult = true;
createFile(uuid.toString());
fHandler = new FileHandler(uuid.toString());
item = FolderListener.listen(getDirectory(), fHandler, timeoutMillis, fileLengthCheckDelay, null);
processFile(item);
assertEquals(true, item.getFutureResultSync());
assertEquals(true, item.getFutureResult());
System.out.println("TEST process with out listen");
uuid = 4;
createFile(uuid.toString());
fHandler = new FileHandler(uuid.toString());
item = FolderListener.listen(getDirectory(), fHandler, timeoutMillis, fileLengthCheckDelay, getFileName(uuid
.toString()), null);
long expiredTime = System.currentTimeMillis() + maxWaitTimeoutMillis;
while (item.getFuture() == null) {
if (expiredTime < System.currentTimeMillis()) {
throw new InterruptedException("Timeout has been expired");
}
Thread.sleep(100);
}
assertEquals(true, item.getFutureResultSync());
assertEquals(true, item.getFutureResult());
FolderListener.terminateAll();
expiredTime = System.currentTimeMillis() + maxWaitTimeoutMillis;
while (FolderListener.getListeners().size() > 0) {
if (expiredTime < System.currentTimeMillis()) {
throw new InterruptedException("Timeout has been expired");
}
Thread.sleep(100);
}
System.out.println("All listen tests passed");
for (int i = 1; i <= uuid; i++) {
removeFile(String.valueOf(i));
}
}
}