/*
* Copyright 2015 JBoss Inc
*
* Licensed 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 io.apiman.test.policies;
import io.apiman.gateway.engine.IApiConnection;
import io.apiman.gateway.engine.IApiConnectionResponse;
import io.apiman.gateway.engine.async.AsyncResultImpl;
import io.apiman.gateway.engine.async.IAsyncResultHandler;
import io.apiman.gateway.engine.beans.Api;
import io.apiman.gateway.engine.beans.ApiRequest;
import io.apiman.gateway.engine.io.IApimanBuffer;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
/**
* A connection a simulated back end API.
*
* @author eric.wittmann@redhat.com
*/
public class PolicyTesterApiConnection implements IApiConnection {
private static IPolicyTestBackEndApi createBackEndApi(String endpoint) {
try {
@SuppressWarnings("unchecked")
Class<? extends IPolicyTestBackEndApi> theClass = (Class<? extends IPolicyTestBackEndApi>) Class.forName(endpoint);
return theClass.newInstance();
} catch (Exception e) {
throw new RuntimeException(e);
}
}
private final ApiRequest request;
private final IAsyncResultHandler<IApiConnectionResponse> handler;
private ByteArrayOutputStream output;
private final IPolicyTestBackEndApi backEndApi;
private boolean finished;
/**
* Constructor.
* @param api
* @param request
* @param handler
*/
public PolicyTesterApiConnection(Api api, ApiRequest request,
IAsyncResultHandler<IApiConnectionResponse> handler) {
this.request = request;
this.handler = handler;
this.output = null;
this.backEndApi = createBackEndApi(api.getEndpoint());
}
/**
* @see io.apiman.gateway.engine.io.IWriteStream#write(io.apiman.gateway.engine.io.IApimanBuffer)
*/
@Override
public void write(IApimanBuffer chunk) {
if (this.output == null) {
this.output = new ByteArrayOutputStream();
}
try {
this.output.write(chunk.getBytes());
} catch (IOException e) {
// should never happen :)
}
}
/**
* @see io.apiman.gateway.engine.io.IWriteStream#end()
*/
@Override
public void end() {
PolicyTestBackEndApiResponse response = backEndApi.invoke(request,
output == null ? null : output.toByteArray());
IApiConnectionResponse connectionResponse = new PolicyTesterApiConnectionResponse(response);
handler.handle(AsyncResultImpl.create(connectionResponse));
finished = true;
}
/**
* @see io.apiman.gateway.engine.io.IStream#isFinished()
*/
@Override
public boolean isFinished() {
return finished;
}
/**
* @see io.apiman.gateway.engine.IApiConnection#isConnected()
*/
@Override
public boolean isConnected() {
return !isFinished();
}
/**
* @see io.apiman.gateway.engine.io.IAbortable#abort()
*/
@Override
public void abort(Throwable t) {
finished = true;
}
}