org.jruby.rack.mock.MockAsyncContext.java Source code

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Here is the source code for org.jruby.rack.mock.MockAsyncContext.java

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/*
 * Copyright 2002-2013 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 org.jruby.rack.mock;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.AsyncContext;
import javax.servlet.AsyncEvent;
import javax.servlet.AsyncListener;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

//import org.springframework.beans.BeanUtils;
//import org.springframework.web.util.WebUtils;

/**
 * Mock implementation of the {@link AsyncContext} interface.
 *
 * @author Rossen Stoyanchev
 */
public class MockAsyncContext implements AsyncContext {

    private final HttpServletRequest request;

    private final HttpServletResponse response;

    private final List<AsyncListener> listeners = new ArrayList<AsyncListener>();

    private String dispatchedPath;

    private long timeout = 10 * 1000L; // 10 seconds is Tomcat's default

    private final List<Runnable> dispatchHandlers = new ArrayList<Runnable>();

    public MockAsyncContext(ServletRequest request, ServletResponse response) {
        this.request = (HttpServletRequest) request;
        this.response = (HttpServletResponse) response;
    }

    public void addDispatchHandler(Runnable handler) {
        this.dispatchHandlers.add(handler);
    }

    @Override
    public ServletRequest getRequest() {
        return this.request;
    }

    @Override
    public ServletResponse getResponse() {
        return this.response;
    }

    @Override
    public boolean hasOriginalRequestAndResponse() {
        return (this.request instanceof MockHttpServletRequest)
                && (this.response instanceof MockHttpServletResponse);
    }

    @Override
    public void dispatch() {
        dispatch(this.request.getRequestURI());
    }

    @Override
    public void dispatch(String path) {
        dispatch(null, path);
    }

    @Override
    public void dispatch(ServletContext context, String path) {
        this.dispatchedPath = path;
        for (Runnable r : this.dispatchHandlers) {
            r.run();
        }
    }

    public String getDispatchedPath() {
        return this.dispatchedPath;
    }

    @Override
    public void complete() {
        MockHttpServletRequest mockRequest = WebUtils.getNativeRequest(request, MockHttpServletRequest.class);
        if (mockRequest != null) {
            mockRequest.setAsyncStarted(false);
        }
        for (AsyncListener listener : this.listeners) {
            try {
                listener.onComplete(new AsyncEvent(this, this.request, this.response));
            } catch (IOException e) {
                throw new IllegalStateException("AsyncListener failure", e);
            }
        }
    }

    @Override
    public void start(Runnable runnable) {
        runnable.run();
    }

    @Override
    public void addListener(AsyncListener listener) {
        this.listeners.add(listener);
    }

    @Override
    public void addListener(AsyncListener listener, ServletRequest request, ServletResponse response) {
        this.listeners.add(listener);
    }

    public List<AsyncListener> getListeners() {
        return this.listeners;
    }

    @Override
    public <T extends AsyncListener> T createListener(Class<T> clazz) throws ServletException {
        return instantiate(clazz); // BeanUtils.instantiateClass(clazz);
    }

    @Override
    public void setTimeout(long timeout) {
        this.timeout = timeout;
    }

    @Override
    public long getTimeout() {
        return this.timeout;
    }

    private static <T> T instantiate(Class<T> clazz) throws IllegalArgumentException {
        if (clazz.isInterface()) {
            throw new IllegalArgumentException(clazz + " is an interface");
        }
        try {
            return clazz.newInstance();
        } catch (InstantiationException ex) {
            throw new IllegalArgumentException(clazz + " is it an abstract class?", ex);
        } catch (IllegalAccessException ex) {
            throw new IllegalArgumentException(clazz + " constructor accessible?", ex);
        }
    }

}