private Pipeline createFallbackPipeline(ServiceId svcId, PipelineMode pipelineMode)
throws ServiceException {
ClassLoader cl = Pipeline.class.getClassLoader();
Pipeline result = new PipelineImpl();
PipelineInitContextImpl initCtx = new PipelineInitContextImpl(svcId, pipelineMode, cl, null);
result.init(initCtx);
initCtx.kill();
return result;
}
private void runRequestSequence(BaseMessageContextImpl ctx) {
ServiceDesc serviceDesc = ctx.getServiceDesc();
// flip the processing stage
ctx.changeProcessingStage(MessageProcessingStage.REQUEST_PIPELINE);
// first set up logging handler
ctx.runLoggingHandlerStage(LoggingHandlerStage.REQUEST_STARTED);
long startTime = System.nanoTime();
// run the protocol processor
try {
ProtocolProcessor protocol = ctx.getProtocolProcessor();
protocol.beforeRequestPipeline(ctx);
} catch (Throwable e) {
handleRequestProtocolProcessingException(ctx, e);
}
// run any logic that has to run before pipeline (e.g. version checks)
try {
beforeRequestPipeline(ctx);
} catch (Throwable e) {
handleRequestProcessingException(ctx, e);
}
// run the pipeline
try {
Pipeline requestPipeline = serviceDesc.getRequestPipeline();
requestPipeline.invoke(ctx);
} catch (Throwable e) {
handleRequestProcessingException(ctx, e);
}
// run the protocol processor
try {
ProtocolProcessor protocol = ctx.getProtocolProcessor();
protocol.beforeRequestDispatch(ctx);
} catch (Throwable e) {
handleRequestProtocolProcessingException(ctx, e);
}
// flip the processing stage
ctx.changeProcessingStage(MessageProcessingStage.REQUEST_DISPATCH);
ctx.runLoggingHandlerStage(LoggingHandlerStage.BEFORE_REQUEST_DISPATCH);
long duration = System.nanoTime() - startTime;
ctx.updateSvcAndOpMetric(SystemMetricDefs.OP_TIME_PIPELINE_REQUEST, startTime, duration);
}
void runResponseSequence(BaseMessageContextImpl ctx) {
ServiceDesc serviceDesc = ctx.getServiceDesc();
long startTime = System.nanoTime();
// flip the processing stage
ctx.changeProcessingStage(MessageProcessingStage.RESPONSE_PIPELINE);
ctx.runLoggingHandlerStage(LoggingHandlerStage.RESPONSE_STARTED);
// run the protocol processor
try {
ProtocolProcessor protocol = ctx.getProtocolProcessor();
protocol.beforeResponsePipeline(ctx);
} catch (Throwable e) {
handleResponseProtocolProcessingException(ctx, e);
}
// run the pipeline
try {
Pipeline responsePipeline = serviceDesc.getResponsePipeline();
responsePipeline.invoke(ctx);
} catch (Throwable e) {
handleResponseProcessingException(ctx, e);
}
// run the protocol processor
try {
ProtocolProcessor protocol = ctx.getProtocolProcessor();
protocol.beforeResponseDispatch(ctx);
} catch (Throwable e) {
handleResponseProtocolProcessingException(ctx, e);
}
// flip the processing stage
ctx.changeProcessingStage(MessageProcessingStage.RESPONSE_DISPATCH);
boolean canProcessResponse = true;
try {
processPreResponseDispatchErrors(ctx);
} catch (Throwable e) {
// cannot do anything if errors are not processed
canProcessResponse = false;
handlePostResponseDispatchException(ctx, e);
}
long duration = System.nanoTime() - startTime;
ctx.updateSvcAndOpMetric(SystemMetricDefs.OP_TIME_PIPELINE_RESPONSE, startTime, duration);
if (canProcessResponse) {
/*
* Returning response is a seperate step. It is also abstracted out
* through a dispatcher. In the case of a servlet, the
* responseDispatcher is simply writing the data to the
* HTTPResponse's outputstream. In the case of a Loaclbinding and
* client cases, the response dispatcher simply returns and does
* nothing. In the case of an asynchronous model, the response
* dispatcher may use a connection and send the response back.
*/
// TODO: add timing for response dispatcher on server (both sync and
// async cases)
// TO DO: fix async case - we should use callback and uplink here as
// we cannot call logger yet
try {
// run through the response dispatcher.
Dispatcher responseDispatcher = serviceDesc.getResponseDispatcher();
responseDispatcher.dispatchSynchronously(ctx);
} catch (Throwable e) {
handlePostResponseDispatchException(ctx, e);
}
}
ctx.changeProcessingStage(MessageProcessingStage.RESPONSE_COMPLETE);
ctx.runLoggingHandlerStage(LoggingHandlerStage.RESPONSE_COMPLETE);
}
