org.mandas.docker.client.EventStream Maven / Gradle / Ivy
/*-
* -\-\-
* docker-client
* --
* Copyright (C) 2016 Spotify AB
* Copyright (C) 9/2019 - 2020 Dimitris Mandalidis
* --
* 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.mandas.docker.client;
import java.io.Closeable;
import java.io.IOException;
import java.io.InputStream;
import java.util.Iterator;
import java.util.NoSuchElementException;
import org.mandas.docker.client.messages.Event;
import com.fasterxml.jackson.databind.ObjectMapper;
public class EventStream implements Iterator, Closeable {
private final EventReader reader;
private Event next;
public EventStream(InputStream stream, ObjectMapper objectMapper) {
this.reader = new EventReader(stream, objectMapper);
}
@Override
public void close() throws IOException {
reader.close();
}
@Override
public boolean hasNext() {
if (next != null) {
return true;
}
try {
next = reader.nextMessage();
} catch (IOException e) {
throw new RuntimeException(e);
}
return next != null;
}
@Override
public Event next() {
if (!hasNext()) {
throw new NoSuchElementException();
}
Event value = next;
next = null;
return value;
}
}