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Camunda 7 Keycloak Identity Provider Plugin including all transitive dependencies
/*
* ====================================================================
* 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* .
*
*/
package org.apache.hc.core5.http2.impl.nio;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.GatheringByteChannel;
import java.nio.channels.WritableByteChannel;
import org.apache.hc.core5.http2.H2TransportMetrics;
import org.apache.hc.core5.http2.frame.FrameConsts;
import org.apache.hc.core5.http2.frame.RawFrame;
import org.apache.hc.core5.http2.impl.BasicH2TransportMetrics;
import org.apache.hc.core5.util.Args;
/**
* Frame output buffer for HTTP/2 non-blocking connections.
*
* @since 5.0
*/
public final class FrameOutputBuffer {
private final BasicH2TransportMetrics metrics;
private int maxFramePayloadSize;
private ByteBuffer buffer;
public FrameOutputBuffer(final BasicH2TransportMetrics metrics, final int maxFramePayloadSize) {
Args.notNull(metrics, "HTTP2 transport metrics");
Args.positive(maxFramePayloadSize, "Maximum payload size");
this.metrics = metrics;
this.maxFramePayloadSize = maxFramePayloadSize;
this.buffer = ByteBuffer.allocate(FrameConsts.HEAD_LEN + maxFramePayloadSize);
}
public FrameOutputBuffer(final int maxFramePayloadSize) {
this(new BasicH2TransportMetrics(), maxFramePayloadSize);
}
/**
* @deprecated Misnomer. Use {@link #resize(int)}.
*/
@Deprecated
public void expand(final int maxFramePayloadSize) {
resize(maxFramePayloadSize);
}
/**
* @since 5.2
*/
public int getMaxFramePayloadSize() {
return maxFramePayloadSize;
}
/**
* @since 5.2
*/
public void resize(final int maxFramePayloadSize) {
if (buffer.capacity() == maxFramePayloadSize) {
return;
}
this.maxFramePayloadSize = maxFramePayloadSize;
final ByteBuffer newBuffer = ByteBuffer.allocate(FrameConsts.HEAD_LEN + maxFramePayloadSize);
if (buffer.position() > 0) {
buffer.flip();
newBuffer.put(buffer);
}
buffer = newBuffer;
}
public void write(final RawFrame frame, final WritableByteChannel channel) throws IOException {
Args.notNull(frame, "Frame");
final ByteBuffer payload = frame.getPayload();
Args.check(payload == null || payload.remaining() <= maxFramePayloadSize, "Frame size exceeds maximum");
buffer.putInt((payload != null ? payload.remaining() << 8 : 0) | (frame.getType() & 0xff));
buffer.put((byte) (frame.getFlags() & 0xff));
buffer.putInt(frame.getStreamId());
if (payload != null) {
if (channel instanceof GatheringByteChannel) {
buffer.flip();
((GatheringByteChannel) channel).write(new ByteBuffer[]{buffer, payload});
buffer.compact();
if (payload.hasRemaining()) {
buffer.put(payload);
}
} else {
buffer.put(payload);
}
}
flush(channel);
metrics.incrementFramesTransferred();
}
public void flush(final WritableByteChannel channel) throws IOException {
if (buffer.position() > 0) {
buffer.flip();
try {
final int bytesWritten = channel.write(buffer);
if (bytesWritten > 0) {
metrics.incrementBytesTransferred(bytesWritten);
}
} finally {
buffer.compact();
}
}
}
public boolean isEmpty() {
return buffer.position() == 0;
}
public H2TransportMetrics getMetrics() {
return metrics;
}
}