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io.fabric8.docker.client.impl.EventHandle Maven / Gradle / Ivy
/*
* Copyright (C) 2016 Original 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 io.fabric8.docker.client.impl;
import com.squareup.okhttp.Request;
import com.squareup.okhttp.Response;
import io.fabric8.docker.api.model.Callback;
import io.fabric8.docker.client.DockerClientException;
import io.fabric8.docker.dsl.EventListener;
import io.fabric8.docker.dsl.OutputHandle;
import io.fabric8.docker.client.ProgressEvent;
import io.fabric8.docker.client.utils.InputStreamPumper;
import io.fabric8.docker.client.utils.Utils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.Closeable;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PipedInputStream;
import java.io.PipedOutputStream;
import java.util.HashSet;
import java.util.Set;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicReference;
public class EventHandle implements OutputHandle, com.squareup.okhttp.Callback {
private static final Logger LOGGER = LoggerFactory.getLogger(EventHandle.class);
private final long timeoutMillis;
private final OutputStream out;
private final PipedInputStream pin;
private final EventListener listener;
private final ExecutorService executorService = Executors.newSingleThreadExecutor();
private final AtomicReference response = new AtomicReference<>();
private final AtomicReference error = new AtomicReference<>();
private final CountDownLatch latch = new CountDownLatch(1);
private final Set closeables = new HashSet<>();
private final AtomicBoolean succeded = new AtomicBoolean(false);
private final AtomicBoolean failed = new AtomicBoolean(false);
public EventHandle(OutputStream out, long duration, TimeUnit unit) {
this(out, duration, unit, OperationSupport.NULL_LISTENER);
}
public EventHandle(OutputStream out, long duration, TimeUnit unit, EventListener listener) {
this(out, unit.toMillis(duration), listener);
}
public EventHandle(OutputStream out, long timeoutMillis, EventListener listener) {
this.out = out;
this.timeoutMillis = timeoutMillis;
this.listener = listener;
if (out instanceof PipedOutputStream) {
try {
this.pin = new PipedInputStream();
this.pin.connect((PipedOutputStream) out);
} catch (IOException e) {
throw DockerClientException.launderThrowable(e);
}
} else {
pin = null;
}
}
public boolean isSuccess(ProgressEvent event) {
return false;
}
public boolean isFailure(ProgressEvent event) {
return false;
}
@Override
public void onFailure(Request request, IOException e) {
error.set(e);
listener.onError(e.getMessage());
latch.countDown();
}
@Override
public void onResponse(Response r) throws IOException {
response.set(r);
if (r.code() == 200) {
InputStreamPumper pumper = new InputStreamPumper(r.body().byteStream(), new Callback() {
@Override
public Void call(byte[] data) {
onEvent(new String(data));
return null;
}
}, new Callback() {
@Override
public Void call(Boolean success) {
if (success) {
if (succeded.compareAndSet(false, true)) {
listener.onSuccess("");
}
} else {
if (failed.compareAndSet(false, true)) {
listener.onError("");
}
}
return null;
}
});
closeables.add(pumper);
executorService.submit(pumper);
} else {
onFailure(r.request(), new IOException(r.body().string()));
}
latch.countDown();
}
private void onEvent(String line) {
ProgressEvent event = null;
try {
event = OperationSupport.JSON_MAPPER.readValue(line, ProgressEvent.class);
if (event == null) {
//ignore
} else if (isFailure(event) && failed.compareAndSet(false, true)) {
String error = event.getError();
listener.onError(error);
} else {
if (isSuccess(event) && succeded.compareAndSet(false, true)) {
listener.onSuccess(event.toString());
} else {
listener.onEvent(event.toString());
}
}
} catch (IOException t) {
LOGGER.debug("Error while handling event.", t);
} finally {
if (event != null && out != null) {
try {
out.write(event.toString().getBytes());
} catch (IOException e) {
LOGGER.debug("Error while writing event to output stream.", e);
}
}
}
}
@Override
public InputStream getOutput() {
try {
if (latch.await(timeoutMillis, TimeUnit.MILLISECONDS)) {
Throwable t = error.get();
Response r = response.get();
if (t != null) {
throw DockerClientException.launderThrowable(t);
} else if (r == null) {
throw new DockerClientException("Response not available");
} else if (!r.isSuccessful()) {
throw new DockerClientException(r.message());
} else if (pin == null) {
throw new DockerClientException("InputStream not available. Have you used redirectingOutput()?");
} else {
return pin;
}
} else {
throw new DockerClientException("Timed out waiting for response");
}
} catch (InterruptedException e) {
try {
close();
} catch (IOException ioe) {
throw DockerClientException.launderThrowable(e);
} finally {
Thread.currentThread().interrupt();
}
}
throw new DockerClientException("Could not obtain stream");
}
@Override
public void close() throws IOException {
for (Closeable c : closeables) {
try {
c.close();
} catch (IOException e) {
LOGGER.warn("Error while closing stream pumper:" + e.getMessage());
}
}
executorService.shutdown();
try {
if (!executorService.awaitTermination(10, TimeUnit.SECONDS)) {
executorService.shutdownNow();
}
} catch (InterruptedException e) {
executorService.shutdownNow();
Thread.currentThread().interrupt();
}
Response r = response.get();
if (r != null) {
try {
r.body().source().close();
} catch (Throwable t) {
LOGGER.warn("Error while closing response stream:" + t.getMessage());
}
}
}
}
