org.apache.heron.uploader.http.HttpUploader.java Source code

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Here is the source code for org.apache.heron.uploader.http.HttpUploader.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 org.apache.heron.uploader.http;

import java.io.File;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.nio.charset.StandardCharsets;
import java.util.logging.Level;
import java.util.logging.Logger;

import com.google.common.base.Preconditions;

import org.apache.commons.lang3.StringUtils;
import org.apache.heron.spi.common.Config;
import org.apache.heron.spi.common.Context;
import org.apache.heron.spi.common.Key;
import org.apache.heron.spi.uploader.IUploader;
import org.apache.heron.spi.uploader.UploaderException;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.mime.HttpMultipartMode;
import org.apache.http.entity.mime.MultipartEntityBuilder;
import org.apache.http.entity.mime.content.FileBody;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

/**
 * Provides a basic uploader class for uploading topology packages via Http.
 */
public class HttpUploader implements IUploader {
    private static final Logger LOG = Logger.getLogger(HttpUploader.class.getName());

    private static final String FILE = "file";
    private Config config;
    private String topologyPackageLocation;
    private HttpPost post;

    @Override
    @SuppressWarnings("HiddenField")
    public void initialize(Config config) {
        String uploaderUri = HttpUploaderContext.getHeronUploaderHttpUri(config);
        Preconditions.checkArgument(StringUtils.isNotBlank(uploaderUri),
                HttpUploaderContext.HERON_UPLOADER_HTTP_URI + " property must be set");

        String topologyPackageFile = Context.topologyPackageFile(config);
        Preconditions.checkArgument(StringUtils.isNotBlank(topologyPackageFile),
                Key.TOPOLOGY_PACKAGE_FILE + " property must be set");

        this.config = config;
        this.topologyPackageLocation = topologyPackageFile;
    }

    @Override
    public URI uploadPackage() throws UploaderException {
        try (CloseableHttpClient httpclient = HttpClients.custom().build()) {
            return uploadPackageAndGetURI(httpclient);
        } catch (IOException | URISyntaxException e) {
            String msg = "Error uploading package to location: " + this.topologyPackageLocation;
            LOG.log(Level.SEVERE, msg, e);
            throw new UploaderException(msg, e);
        }
    }

    private URI uploadPackageAndGetURI(final CloseableHttpClient httpclient)
            throws IOException, URISyntaxException {
        File file = new File(this.topologyPackageLocation);
        String uploaderUri = HttpUploaderContext.getHeronUploaderHttpUri(this.config);
        post = new HttpPost(uploaderUri);
        FileBody fileBody = new FileBody(file, ContentType.DEFAULT_BINARY);
        MultipartEntityBuilder builder = MultipartEntityBuilder.create();
        builder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
        builder.addPart(FILE, fileBody);
        HttpEntity entity = builder.build();
        post.setEntity(entity);
        HttpResponse response = execute(httpclient);
        String responseString = EntityUtils.toString(response.getEntity(), StandardCharsets.UTF_8.name());
        LOG.fine("Topology package download URI: " + responseString);

        return new URI(responseString);
    }

    protected HttpResponse execute(final HttpClient client) throws IOException {
        return client.execute(post);
    }

    protected HttpPost getPost() {
        return post;
    }

    @Override
    public boolean undo() {
        return false;
    }

    @Override
    public void close() {

    }
}