/*
* 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.kafka.common.requests;
import org.apache.kafka.common.network.Send;
import org.apache.kafka.common.network.TransportLayers;
import org.apache.kafka.common.record.Records;
import java.io.EOFException;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.GatheringByteChannel;
public class RecordsSend implements Send {
private static final ByteBuffer EMPTY_BYTE_BUFFER = ByteBuffer.allocate(0);
private final String destination;
private final Records records;
private int remaining;
private boolean pending = false;
public RecordsSend(String destination, Records records) {
this.destination = destination;
this.records = records;
this.remaining = records.sizeInBytes();
}
@Override
public String destination() {
return destination;
}
@Override
public boolean completed() {
return remaining <= 0 && !pending;
}
@Override
public long writeTo(GatheringByteChannel channel) throws IOException {
long written = 0;
if (remaining > 0) {
written = records.writeTo(channel, size() - remaining, remaining);
if (written < 0)
throw new EOFException("Wrote negative bytes to channel. This shouldn't happen.");
remaining -= written;
}
pending = TransportLayers.hasPendingWrites(channel);
if (remaining <= 0 && pending)
channel.write(EMPTY_BYTE_BUFFER);
return written;
}
@Override
public long size() {
return records.sizeInBytes();
}
}