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package com.sun.xml.ws.api.server;
import com.oracle.webservices.api.message.PropertySet;
import com.sun.istack.NotNull;
import com.sun.istack.Nullable;
import com.sun.xml.ws.api.message.Message;
import com.sun.xml.ws.api.message.Packet;
import com.sun.xml.ws.api.pipe.Codec;
import com.sun.xml.ws.util.Pool;
import java.io.IOException;
/**
* Partial server side async transport implementation. It manages pooling of
* {@link Codec} and other details.
*
* @author Jitendra Kotamraju
*/
public abstract class AbstractServerAsyncTransport {
private final WSEndpoint endpoint;
private final CodecPool codecPool;
/**
* {@link WSEndpoint#setExecutor} should be called before creating the
* transport
*
* @param endpoint webservices requests are directed towards this endpoint
*/
public AbstractServerAsyncTransport(WSEndpoint endpoint) {
this.endpoint = endpoint;
codecPool = new CodecPool(endpoint);
}
/**
* decodes the transport data to Packet
*
* @param connection that carries the web service request
* @param codec for encoding/decoding {@link Message}
* @return decoded {@link Packet}
* @throws IOException if an i/o error happens while encoding/decoding
*/
protected Packet decodePacket(T connection, @NotNull Codec codec) throws IOException {
Packet packet = new Packet();
packet.acceptableMimeTypes = getAcceptableMimeTypes(connection);
packet.addSatellite(getPropertySet(connection));
packet.transportBackChannel = getTransportBackChannel(connection);
return packet;
}
/**
* Encodes the {@link Packet} to infoset and writes on the connection.
*
* @param connection that carries the web service request
* @param packet that needs to encoded to infoset
* @param codec that does the encoding of Packet
* @throws IOException if an i/o error happens while encoding/decoding
*/
protected abstract void encodePacket(T connection, @NotNull Packet packet, @NotNull Codec codec) throws IOException;
/**
* If the request has Accept header, return that value
*
* @param connection that carries the web service request
* @return Accept MIME types
*/
protected abstract @Nullable String getAcceptableMimeTypes(T connection);
/**
* {@link TransportBackChannel} used by jax-ws runtime to close the connection
* while the processing of the request is still continuing. In oneway HTTP case, a
* response code needs to be sent before invoking the endpoint.
*
* @param connection that carries the web service request
* @return TransportBackChannel instance using the connection
*/
protected abstract @Nullable TransportBackChannel getTransportBackChannel(T connection);
/**
* If there are any properties associated with the connection, those will
* be added to {@link Packet}
*
* @param connection that carries the web service request
* @return {@link PropertySet} for the connection
*/
protected abstract @NotNull PropertySet getPropertySet(T connection);
/**
* Return a {@link WebServiceContextDelegate} using the underlying connection.
*
* @param connection that carries the web service request
* @return non-null WebServiceContextDelegate instance
*/
protected abstract @NotNull WebServiceContextDelegate getWebServiceContextDelegate(T connection);
/**
* Reads and decodes infoset from the connection and invokes the endpoints. The
* response is encoded and written to the connection. The response could be
* written using a different thread.
*
* @param connection that carries the web service request
* @throws IOException if an i/o error happens while encoding/decoding
*/
protected void handle(final T connection) throws IOException {
final Codec codec = codecPool.take();
Packet request = decodePacket(connection, codec);
if (!request.getMessage().isFault()) {
endpoint.schedule(request, new WSEndpoint.CompletionCallback() {
public void onCompletion(@NotNull Packet response) {
try {
encodePacket(connection, response, codec);
} catch(IOException ioe) {
ioe.printStackTrace();
}
codecPool.recycle(codec);
}
});
}
}
private static final class CodecPool extends Pool {
WSEndpoint endpoint;
CodecPool(WSEndpoint endpoint) {
this. endpoint = endpoint;
}
protected Codec create() {
return endpoint.createCodec();
}
}
}