co.cask.cdap.internal.MockResponder.java Source code

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Here is the source code for co.cask.cdap.internal.MockResponder.java

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/*
 * Copyright  2014 Cask Data, Inc.
 *
 * 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 co.cask.cdap.internal;

import co.cask.http.AbstractHttpResponder;
import co.cask.http.BodyProducer;
import co.cask.http.ChunkResponder;
import co.cask.http.HttpResponder;
import com.google.common.base.Charsets;
import com.google.common.collect.Multimap;
import com.google.gson.Gson;
import com.google.gson.stream.JsonReader;
import org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.buffer.ChannelBufferInputStream;
import org.jboss.netty.buffer.ChannelBuffers;
import org.jboss.netty.handler.codec.http.HttpResponseStatus;

import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import java.lang.reflect.Type;
import java.nio.ByteBuffer;

/**
 * A mock implementation of {@link HttpResponder} that only record the response status.
 */
public final class MockResponder extends AbstractHttpResponder {
    private HttpResponseStatus status = null;
    private ChannelBuffer content = null;
    private static final Gson GSON = new Gson();

    public HttpResponseStatus getStatus() {
        return status;
    }

    public <T> T decodeResponseContent(Type type) {
        return decodeResponseContent(type, GSON);
    }

    public <T> T decodeResponseContent(Type type, Gson gson) {
        JsonReader jsonReader = new JsonReader(
                new InputStreamReader(new ChannelBufferInputStream(content), Charsets.UTF_8));
        return gson.fromJson(jsonReader, type);
    }

    @Override
    public ChunkResponder sendChunkStart(HttpResponseStatus status, Multimap<String, String> headers) {
        this.status = status;
        return new ChunkResponder() {
            @Override
            public void sendChunk(ByteBuffer chunk) throws IOException {
                sendChunk(ChannelBuffers.wrappedBuffer(chunk));
            }

            @Override
            public void sendChunk(ChannelBuffer chunk) throws IOException {
                if (content == null) {
                    content = ChannelBuffers.dynamicBuffer();
                }
                content.writeBytes(chunk);
            }

            @Override
            public void close() throws IOException {
                // No-op
            }
        };
    }

    @Override
    public void sendContent(HttpResponseStatus status, ChannelBuffer content, String contentType,
            Multimap<String, String> headers) {
        if (content != null) {
            this.content = content;
        }
        this.status = status;
    }

    @Override
    public void sendFile(File file, Multimap<String, String> headers) {
        this.status = HttpResponseStatus.OK;
    }

    @Override
    public void sendContent(HttpResponseStatus httpResponseStatus, BodyProducer bodyProducer,
            Multimap<String, String> multimap) {
        this.status = HttpResponseStatus.OK;
    }
}