org.glassfish.grizzly.spdy.frames.SynStreamFrame Maven / Gradle / Ivy
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package org.glassfish.grizzly.spdy.frames;
import org.glassfish.grizzly.Buffer;
import org.glassfish.grizzly.ThreadCache;
import org.glassfish.grizzly.memory.CompositeBuffer;
import org.glassfish.grizzly.memory.MemoryManager;
import static org.glassfish.grizzly.spdy.Constants.SPDY_VERSION;
public class SynStreamFrame extends HeadersProviderFrame {
private static final ThreadCache.CachedTypeIndex CACHE_IDX =
ThreadCache.obtainIndex(SynStreamFrame.class, 8);
public static final int TYPE = 1;
/**
* Marks this frame as the last frame to be transmitted on this stream and
* puts the sender in the half-closed.
*/
public static final byte FLAG_FIN = 0x01;
/**
* A stream created with this flag puts the recipient in the half-closed
* state.
*/
public static final byte FLAG_UNIDIRECTIONAL = 0x02;
protected int streamId;
protected int associatedToStreamId;
protected int priority;
protected int slot;
// ------------------------------------------------------------ Constructors
private SynStreamFrame() { }
// ---------------------------------------------------------- Public Methods
static SynStreamFrame create() {
SynStreamFrame frame = ThreadCache.takeFromCache(CACHE_IDX);
if (frame == null) {
frame = new SynStreamFrame();
}
return frame;
}
static SynStreamFrame create(final SpdyHeader header) {
SynStreamFrame frame = create();
frame.initialize(header);
return frame;
}
public static SynStreamFrameBuilder builder() {
return new SynStreamFrameBuilder();
}
public int getStreamId() {
return streamId;
}
public int getAssociatedToStreamId() {
return associatedToStreamId;
}
public int getPriority() {
return priority;
}
public int getSlot() {
return slot;
}
@Override
public String toString() {
final StringBuilder sb = new StringBuilder();
sb.append("SynStreamFrame");
sb.append("{streamId=").append(streamId);
sb.append(", associatedToStreamId=").append(associatedToStreamId);
sb.append(", priority=").append(priority);
sb.append(", slot=").append(slot);
sb.append(", compressedHeaders=").append(compressedHeaders);
sb.append(", fin=").append(isFlagSet(FLAG_FIN));
sb.append(", unidirectional=").append(isFlagSet(FLAG_UNIDIRECTIONAL));
sb.append('}');
return sb.toString();
}
// -------------------------------------------------- Methods from Cacheable
@Override
public void recycle() {
streamId = 0;
associatedToStreamId = 0;
priority = 0;
slot = 0;
super.recycle();
ThreadCache.putToCache(CACHE_IDX, this);
}
// -------------------------------------------------- Methods from SpdyFrame
@Override
public Buffer toBuffer(MemoryManager memoryManager) {
final Buffer frameBuffer = memoryManager.allocate(18);
frameBuffer.putInt(0x80000000 | (SPDY_VERSION << 16) | TYPE); // C | SPDY_VERSION | SYN_STREAM_FRAME
frameBuffer.putInt((flags << 24) | (compressedHeaders.remaining() + 10)); // FLAGS | LENGTH
frameBuffer.putInt(streamId & 0x7FFFFFFF); // STREAM_ID
frameBuffer.putInt(associatedToStreamId & 0x7FFFFFFF); // ASSOCIATED_TO_STREAM_ID
frameBuffer.putShort((short) ((priority << 13) | (slot & 0xFF))); // PRI | UNUSED | SLOT
frameBuffer.trim();
CompositeBuffer cb = CompositeBuffer.newBuffer(memoryManager, frameBuffer);
cb.append(compressedHeaders);
cb.allowBufferDispose(true);
cb.allowInternalBuffersDispose(true);
return cb;
}
// ------------------------------------------------------- Protected Methods
@Override
protected void initialize(SpdyHeader header) {
super.initialize(header);
streamId = header.buffer.getInt() & 0x7FFFFFFF;
associatedToStreamId = header.buffer.getInt() & 0x7FFFFFFF;
final int tmpInt = header.buffer.getShort() & 0xFFFF;
priority = tmpInt >> 13;
slot = tmpInt & 0xFF;
}
// ---------------------------------------------------------- Nested Classes
public static class SynStreamFrameBuilder extends HeadersProviderFrameBuilder {
private final SynStreamFrame synStreamFrame;
// -------------------------------------------------------- Constructors
protected SynStreamFrameBuilder() {
super(SynStreamFrame.create());
synStreamFrame = (SynStreamFrame) frame;
}
// ------------------------------------------------------ Public Methods
public SynStreamFrameBuilder streamId(final int streamId) {
synStreamFrame.streamId = streamId;
return this;
}
public SynStreamFrameBuilder associatedStreamId(final int associatedStreamId) {
synStreamFrame.associatedToStreamId = associatedStreamId;
return this;
}
public SynStreamFrameBuilder priority(final int priority) {
synStreamFrame.priority = priority;
return this;
}
public SynStreamFrameBuilder slot(final int slot) {
synStreamFrame.slot = slot;
return this;
}
public SynStreamFrameBuilder unidirectional(boolean unidirectional) {
if (unidirectional) {
synStreamFrame.setFlag(SynStreamFrame.FLAG_UNIDIRECTIONAL);
} else {
synStreamFrame.clearFlag(SynStreamFrame.FLAG_UNIDIRECTIONAL);
}
return this;
}
public SynStreamFrameBuilder last(boolean last) {
if (last) {
synStreamFrame.setFlag(SynStreamFrame.FLAG_FIN);
} else {
synStreamFrame.clearFlag(SynStreamFrame.FLAG_FIN);
}
return this;
}
public SynStreamFrame build() {
return synStreamFrame;
}
// --------------------------------------- Methods from SpdyFrameBuilder
@Override
protected SynStreamFrameBuilder getThis() {
return this;
}
} // END SynStreamFrameBuilder
}
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