/*******************************************************************************
* Copyright 2013 butor.com
*
* 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 org.butor.json.service;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.util.Set;
import org.butor.json.JsonServiceRequest;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.common.reflect.Reflection;
public class ServiceCallerFactory<T> {
protected Logger logger = LoggerFactory.getLogger(getClass());
private ServiceCaller<T> _sc;
public ServiceCallerFactory(String namespace_, String url_) {
this(namespace_, url_, -1, null);
}
public ServiceCallerFactory(String namespace_, String url_, int maxPayloadLengthToLog) {
this(namespace_, url_, -1, null);
}
public ServiceCallerFactory(String namespace, String url,
int maxPayloadLengthToLog, Set<String> servicesToNotLogArgs) {
logger.info("Creating service caller: namespace={}, url={} ...", namespace, url);
_sc = getServiceCaller(namespace, url, maxPayloadLengthToLog, servicesToNotLogArgs);
}
protected ServiceCaller<T> getServiceCaller(String namespace, String url,
int maxPayloadLengthToLog, Set<String> servicesToNotLogArgs) {
DefaultServiceCaller<T> dsc = new DefaultServiceCaller<T>(namespace, url);
dsc.setMaxPayloadLengthToLog(maxPayloadLengthToLog);
dsc.setServicesToNotLogArgs(servicesToNotLogArgs);
return dsc;
}
public <E> Context<E> getContext(
final String userId_,
final String sessionId_,
final String reqId,
final String lang_,
final ResponseHandler<E> handler_) {
final JsonServiceRequest jsr = _sc.createRequest(
"", null, userId_, sessionId_, reqId);
jsr.setLang(lang_);
Context<E> ctx = new Context<E>() {
@Override
public ResponseHandler<E> getResponseHandler() {
return handler_;
}
@Override
public JsonServiceRequest getRequest() {
return jsr;
}
};
return ctx;
}
public T createServiceCaller(Class<T> interface_) {
InvocationHandler ih = new InvocationHandler() {
@Override
public Object invoke(Object proxy_, Method method_, Object[] args_)
throws Throwable {
Context<?> ctx = (Context<?>)args_[0];
// remove context from args passed to service as json args
Object[] serviceArgs = new Object[args_.length-1];
for (int ii=1; ii<args_.length;ii++)
serviceArgs[ii-1] = args_[ii];
JsonServiceRequest jsr = (JsonServiceRequest)ctx.getRequest();
jsr.setService(method_.getName());
jsr.setServiceArgsJson(_sc.serialize(serviceArgs));
_sc.call(jsr, ctx.getResponseHandler());
return null;
}
};
return Reflection.newProxy(interface_, ih);
}
}