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package org.glassfish.jersey.test.util.client;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.Future;
import javax.ws.rs.ProcessingException;
import javax.ws.rs.core.Response;
import org.glassfish.jersey.client.ClientRequest;
import org.glassfish.jersey.client.ClientResponse;
import org.glassfish.jersey.client.spi.AsyncConnectorCallback;
import org.glassfish.jersey.client.spi.Connector;
import org.glassfish.jersey.message.internal.HeaderUtils;
import org.glassfish.jersey.message.internal.OutboundMessageContext;
/**
* Loop-Back connector used for testing/benchmarking purposes. It returns a response that contains the same data (headers, entity)
* as the processed request. The status of the response is {@code 600}.
*
* @author Michal Gajdos
* @since 2.17
*/
final class LoopBackConnector implements Connector {
/**
* Test loop-back status code.
*/
static final int TEST_LOOPBACK_CODE = 600;
/**
* Test loop-back status type.
*/
static final Response.StatusType LOOPBACK_STATUS = new Response.StatusType() {
@Override
public int getStatusCode() {
return TEST_LOOPBACK_CODE;
}
@Override
public Response.Status.Family getFamily() {
return Response.Status.Family.OTHER;
}
@Override
public String getReasonPhrase() {
return "Test connector loop-back";
}
};
private volatile boolean closed = false;
@Override
public ClientResponse apply(final ClientRequest request) {
return _apply(request);
}
@Override
public Future<?> apply(final ClientRequest request, final AsyncConnectorCallback callback) {
CompletableFuture<ClientResponse> future = new CompletableFuture<>();
try {
ClientResponse response = _apply(request);
callback.response(response);
future.complete(response);
} catch (final Throwable t) {
callback.failure(t);
future.completeExceptionally(t);
}
return future;
}
private ClientResponse _apply(final ClientRequest request) {
checkNotClosed();
final ClientResponse response = new ClientResponse(LOOPBACK_STATUS, request);
// Headers.
response.headers(HeaderUtils.asStringHeaders(request.getHeaders()));
// Entity.
if (request.hasEntity()) {
response.setEntityStream(new ByteArrayInputStream(bufferEntity(request)));
}
return response;
}
private byte[] bufferEntity(final ClientRequest requestContext) {
final ByteArrayOutputStream baos = new ByteArrayOutputStream(512);
requestContext.setStreamProvider(new OutboundMessageContext.StreamProvider() {
@Override
public OutputStream getOutputStream(final int contentLength) throws IOException {
return baos;
}
});
try {
requestContext.writeEntity();
} catch (final IOException ioe) {
throw new ProcessingException("Error buffering the entity.", ioe);
}
return baos.toByteArray();
}
@Override
public String getName() {
return "test-loop-back-connector";
}
@Override
public void close() {
closed = true;
}
private void checkNotClosed() {
if (closed) {
throw new IllegalStateException("Loop-back Connector closed.");
}
}
}