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Integration with Google Guice for Ratpack applications - https://code.google.com/p/google-guice/

There is a newer version: 2.0.0-rc-1

/*
 * Copyright 2015 the original author or authors.
 *
 * 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 ratpack.guice.internal;

import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;
import ratpack.exec.Execution;
import ratpack.exec.ExecutionException;

public class BlockingInterceptor implements MethodInterceptor {

  @Override
  public Object invoke(MethodInvocation invocation) throws Throwable {
    if (Execution.isBlockingThread()) {
      return invocation.proceed();
    } else {
      throw new ExecutionException("Method " + invocation.getMethod().toString() + " can only be invoked on a Ratpack blocking thread (current thread name: " + Thread.currentThread().getName() + ")");
    }
  }

}