Examples with InterceptDefinition org.apache.camel.model.InterceptDefinition used on opensource projects

Example 1 with InterceptDefinition

use of org.apache.camel.model.InterceptDefinition in project camel by apache.

the class TraceInterceptor method process.

@Override
public boolean process(final Exchange exchange, final AsyncCallback callback) {
    // do not trace if tracing is disabled
    if (!tracer.isEnabled() || (routeContext != null && !routeContext.isTracing())) {
        return processor.process(exchange, callback);
    }
    // logging TraceEvents to avoid infinite looping
    if (exchange.getProperty(Exchange.TRACE_EVENT, false, Boolean.class)) {
        // but we must still process to allow routing of TraceEvents to eg a JPA endpoint
        return processor.process(exchange, callback);
    }
    final boolean shouldLog = shouldLogNode(node) && shouldLogExchange(exchange);
    // whether we should trace it or not, some nodes should be skipped as they are abstract
    // intermediate steps for instance related to on completion
    boolean trace = true;
    boolean sync = true;
    // okay this is a regular exchange being routed we might need to log and trace
    try {
        // before
        if (shouldLog) {
            // traced holds the information about the current traced route path
            if (exchange.getUnitOfWork() != null) {
                TracedRouteNodes traced = exchange.getUnitOfWork().getTracedRouteNodes();
                if (node instanceof OnCompletionDefinition || node instanceof OnExceptionDefinition) {
                    // skip any of these as its just a marker definition
                    trace = false;
                } else if (ProcessorDefinitionHelper.isFirstChildOfType(OnCompletionDefinition.class, node)) {
                    // special for on completion tracing
                    traceOnCompletion(traced, exchange);
                } else if (ProcessorDefinitionHelper.isFirstChildOfType(OnExceptionDefinition.class, node)) {
                    // special for on exception
                    traceOnException(traced, exchange);
                } else if (ProcessorDefinitionHelper.isFirstChildOfType(CatchDefinition.class, node)) {
                    // special for do catch
                    traceDoCatch(traced, exchange);
                } else if (ProcessorDefinitionHelper.isFirstChildOfType(FinallyDefinition.class, node)) {
                    // special for do finally
                    traceDoFinally(traced, exchange);
                } else if (ProcessorDefinitionHelper.isFirstChildOfType(AggregateDefinition.class, node)) {
                    // special for aggregate
                    traceAggregate(traced, exchange);
                } else {
                    // regular so just add it
                    traced.addTraced(new DefaultRouteNode(node, super.getProcessor()));
                }
            } else {
                LOG.trace("Cannot trace as this Exchange does not have an UnitOfWork: {}", exchange);
            }
        }
        // log and trace the processor
        Object state = null;
        if (shouldLog && trace) {
            logExchange(exchange);
            // either call the in or generic trace method depending on OUT has been enabled or not
            if (tracer.isTraceOutExchanges()) {
                state = traceExchangeIn(exchange);
            } else {
                traceExchange(exchange);
            }
        }
        final Object traceState = state;
        // special for interceptor where we need to keep booking how far we have routed in the intercepted processors
        if (node.getParent() instanceof InterceptDefinition && exchange.getUnitOfWork() != null) {
            TracedRouteNodes traced = exchange.getUnitOfWork().getTracedRouteNodes();
            traceIntercept((InterceptDefinition) node.getParent(), traced, exchange);
        }
        // process the exchange
        sync = processor.process(exchange, new AsyncCallback() {

            @Override
            public void done(boolean doneSync) {
                try {
                    // after (trace out)
                    if (shouldLog && tracer.isTraceOutExchanges()) {
                        logExchange(exchange);
                        traceExchangeOut(exchange, traceState);
                    }
                } catch (Throwable e) {
                    // some exception occurred in trace logic
                    if (shouldLogException(exchange)) {
                        logException(exchange, e);
                    }
                    exchange.setException(e);
                } finally {
                    // ensure callback is always invoked
                    callback.done(doneSync);
                }
            }
        });
    } catch (Throwable e) {
        // some exception occurred in trace logic
        if (shouldLogException(exchange)) {
            logException(exchange, e);
        }
        exchange.setException(e);
    }
    return sync;
}