com.hortonworks.amstore.view.proxy.RequestBuilder.java Source code

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Here is the source code for com.hortonworks.amstore.view.proxy.RequestBuilder.java

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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 com.hortonworks.amstore.view.proxy;

import org.apache.ambari.view.URLStreamProvider;
import com.hortonworks.amstore.view.utils.ServiceFormattedException;
import org.json.simple.JSONObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;

/**
 * Request builder with fluent interface
 */
public class RequestBuilder {
    private static final Logger LOG = LoggerFactory.getLogger(RequestBuilder.class);

    //request options
    private String url = null;
    private String method = null;
    private String data = null;

    private HashMap<String, String> headers = null;

    private URLStreamProvider urlStreamProvider;

    /**
     * Constructor for RequestBuilder
     * @param urlStreamProvider url stream provider
     * @param url url
     */
    public RequestBuilder(URLStreamProvider urlStreamProvider, String url) {
        this.urlStreamProvider = urlStreamProvider;
        this.url = url;
    }

    /**
     * Shortcut for making GET request
     * @return ResponseTranslator object that encapsulates InputStream
     */
    public ResponseTranslator get() {
        setMethod("GET");
        return doRequest();
    }

    /**
     * Shortcut for making PUT request
     * @return ResponseTranslator object that encapsulates InputStream
     */
    public ResponseTranslator put() {
        setMethod("PUT");
        return doRequest();
    }

    /**
     * Shortcut for making POST request
     * @return ResponseTranslator object that encapsulates InputStream
     */
    public ResponseTranslator post() {
        setMethod("POST");
        return doRequest();
    }

    /**
     * Shortcut for making DELETE request
     * @return ResponseTranslator object that encapsulates InputStream
     */
    public ResponseTranslator delete() {
        setMethod("DELETE");
        return doRequest();
    }

    /**
     * Make request
     * @return ResponseTranslator object that encapsulates InputStream
     */
    public ResponseTranslator doRequest() {
        LOG.debug(String.format("%s Request to %s", method, url));
        InputStream inputStream = null;
        try {
            inputStream = urlStreamProvider.readFrom(url, method, data, headers);
        } catch (IOException e) {
            throw new ServiceFormattedException(e.getMessage(), e);
        }
        return new ResponseTranslator(inputStream);
    }

    public String getUrl() {
        return url;
    }

    public RequestBuilder setUrl(String url) {
        this.url = url;
        return this;
    }

    public String getMethod() {
        return method;
    }

    public RequestBuilder setMethod(String method) {
        this.method = method;
        return this;
    }

    public String getData() {
        return data;
    }

    public RequestBuilder setData(String data) {
        this.data = data;
        return this;
    }

    public RequestBuilder setData(JSONObject data) {
        this.data = data.toString();
        return this;
    }

    public HashMap<String, String> getHeaders() {
        return headers;
    }

    public RequestBuilder setHeaders(HashMap<String, String> headers) {
        this.headers = headers;
        return this;
    }

    public URLStreamProvider getUrlStreamProvider() {
        return urlStreamProvider;
    }

    public RequestBuilder setUrlStreamProvider(URLStreamProvider urlStreamProvider) {
        this.urlStreamProvider = urlStreamProvider;
        return this;
    }
}