Java example source code file (UiServer.java)

This example Java source code file (UiServer.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

classpathresource, defaultserverfactory, environment, exception, genericexceptionmapper, httpconnectorfactory, immutablemap, instance, override, serverconnector, servlet, simplemodule, string, uiconnectioninfo, uiserver, util

The UiServer.java Java example source code

/*
 *
 *  * Copyright 2015 Skymind,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 org.deeplearning4j.ui;

import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.fasterxml.jackson.databind.module.SimpleModule;
import com.google.common.collect.ImmutableMap;
import io.dropwizard.Application;
import io.dropwizard.assets.AssetsBundle;
import io.dropwizard.jersey.jackson.JsonProcessingExceptionMapper;
import io.dropwizard.jetty.HttpConnectorFactory;
import io.dropwizard.lifecycle.ServerLifecycleListener;
import io.dropwizard.server.DefaultServerFactory;
import io.dropwizard.setup.Bootstrap;
import io.dropwizard.setup.Environment;
import io.dropwizard.views.ViewBundle;
import org.apache.commons.io.IOUtils;
import org.canova.api.util.ClassPathResource;
import org.deeplearning4j.ui.activation.ActivationsDropwiz;
import org.deeplearning4j.ui.activation.ActivationsResource;
import org.deeplearning4j.ui.api.ApiResource;
import org.deeplearning4j.ui.defaults.DefaultDropwiz;
import org.deeplearning4j.ui.defaults.DefaultResource;
import org.deeplearning4j.ui.exception.GenericExceptionMapper;
import org.deeplearning4j.ui.flow.FlowDropwiz;
import org.deeplearning4j.ui.flow.FlowResource;
import org.deeplearning4j.ui.nearestneighbors.NearestNeighborsResource;
import org.deeplearning4j.ui.nearestneighbors.word2vec.NearestNeighborsDropwiz;
import org.deeplearning4j.ui.renders.RendersDropwiz;
import org.deeplearning4j.ui.renders.RendersResource;
import org.deeplearning4j.ui.tsne.TsneDropwiz;
import org.deeplearning4j.ui.tsne.TsneResource;
import org.deeplearning4j.ui.weights.WeightDropwiz;
import org.deeplearning4j.ui.weights.WeightResource;
import org.eclipse.jetty.server.Connector;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.server.ServerConnector;
import org.eclipse.jetty.servlets.CrossOriginFilter;
import org.glassfish.jersey.media.multipart.MultiPartFeature;
import org.nd4j.linalg.api.ndarray.INDArray;
import org.nd4j.serde.jackson.VectorDeSerializer;
import org.nd4j.serde.jackson.VectorSerializer;

import javax.servlet.DispatcherType;
import javax.servlet.FilterRegistration;
import java.io.*;
import java.util.EnumSet;


/**
 * @author Adam Gibson
 */
public class UiServer extends Application<UIConfiguration> {
    private static UiServer INSTANCE;
    private UIConfiguration conf;
    private Environment env;
    public UiServer() {
        INSTANCE = this;
    }
    private int port;
    public int getPort(){ return port; }

    public static synchronized UiServer getInstance() throws Exception {
        if(INSTANCE == null) createServer();
        return INSTANCE;
    }

    public Environment getEnv() {
        return env;
    }


    public UiConnectionInfo getConnectionInfo() {
        UiConnectionInfo info = new UiConnectionInfo.Builder()
                .setPort(getPort())
                .setAddress("localhost")
                .enableHttps(false)
                .build();

        return info;
    }

    @Override
    public void run(UIConfiguration uiConfiguration, Environment environment) throws Exception {
        this.conf = uiConfiguration;
        this.env = environment;

        //Workaround to dropwizard sometimes ignoring ports specified in dropwizard.yml
        int[] portsFromYml = getApplicationPortFromYml();
        if(portsFromYml[0] != -1 ) {
            ((HttpConnectorFactory) ((DefaultServerFactory) uiConfiguration.getServerFactory())
                    .getApplicationConnectors().get(0)).setPort(portsFromYml[0]);
        }
        if(portsFromYml[1] != -1 ) {
            ((HttpConnectorFactory) ((DefaultServerFactory) uiConfiguration.getServerFactory())
                    .getAdminConnectors().get(0)).setPort(portsFromYml[1]);
        }

        //Read the port that actually got assigned (needed for random ports i.e. port: 0 setting in yml)
        environment.lifecycle().addServerLifecycleListener(new ServerLifecycleListener() {
            @Override
            public void serverStarted(Server server) {
                for (Connector connector : server.getConnectors()) {
                    if (connector instanceof ServerConnector) {
                        ServerConnector serverConnector = (ServerConnector) connector;
                        if(!serverConnector.getName().toLowerCase().contains("application")) continue;
                        int port = serverConnector.getLocalPort();
                        try{
                            UiServer.getInstance().port = port;
                        }catch( Exception e ){
                            e.printStackTrace();
                        }
                    }
                }
            }
        });

        environment.jersey().register(MultiPartFeature.class);
        environment.jersey().register(new GenericExceptionMapper());
        environment.jersey().register(new JsonProcessingExceptionMapper());


        environment.jersey().register(new TsneDropwiz(conf.getUploadPath()));
//        environment.jersey().register(new NearestNeighborsDropwiz());
        environment.jersey().register(new DefaultDropwiz());
        environment.jersey().register(new WeightDropwiz());
        environment.jersey().register(new ActivationsDropwiz());
        environment.jersey().register(new RendersDropwiz());
        environment.jersey().register(new ApiResource());
        environment.jersey().register(new GenericExceptionMapper());
        environment.jersey().register(new FlowDropwiz());
        environment.jersey().register(new org.deeplearning4j.ui.nearestneighbors.word2vec.NearestNeighborsDropwiz(conf.getUploadPath()));

        environment.getObjectMapper().configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false);
        environment.getObjectMapper().configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);

        environment.getObjectMapper().registerModule(module());

        configureCors(environment);
    }

    @Override
    public void initialize(Bootstrap<UIConfiguration> bootstrap) {
        //custom serializers for the json serde
        bootstrap.getObjectMapper().registerModule(module());


        bootstrap.addBundle(new ViewBundle<UIConfiguration>() {
            @Override
            public ImmutableMap<String, ImmutableMap getViewConfiguration(
                    UIConfiguration arg0) {
                return ImmutableMap.of();
            }
        });
        bootstrap.addBundle(new AssetsBundle());
    }


    private SimpleModule module() {
        SimpleModule module = new SimpleModule();
        module.addSerializer(INDArray.class, new VectorSerializer());
        module.addDeserializer(INDArray.class, new VectorDeSerializer());
        return module;
    }

    public static void main(String[] args) throws Exception {
        createServer();
    }

    public static void createServer() throws Exception {
        ClassPathResource resource = new ClassPathResource("dropwizard.yml");
        File tmpConfig = resource.getFile();
        INSTANCE = new UiServer();
        INSTANCE.run("server", tmpConfig.getAbsolutePath());
    }



    private void configureCors(Environment environment) {
        FilterRegistration.Dynamic filter = environment.servlets().addFilter("CORS", CrossOriginFilter.class);
        filter.addMappingForUrlPatterns(EnumSet.allOf(DispatcherType.class), true, "/*");
        filter.setInitParameter(CrossOriginFilter.ALLOWED_METHODS_PARAM, "GET,PUT,POST,DELETE,OPTIONS");
        filter.setInitParameter(CrossOriginFilter.ALLOWED_ORIGINS_PARAM, "*");
        filter.setInitParameter(CrossOriginFilter.ACCESS_CONTROL_ALLOW_ORIGIN_HEADER, "*");
        filter.setInitParameter("allowedHeaders", "Content-Type,Authorization,X-Requested-With,Content-Length,Accept,Origin");
        filter.setInitParameter("allowCredentials", "true");
    }


    //Parse dropwizard.yml (if present on classpath) and parse the port specifications
    private int[] getApplicationPortFromYml(){
        int[] toReturn = {-1,-1};
        ClassPathResource resource = new ClassPathResource("dropwizard.yml");
        InputStream in = null;
        try {
             in = resource.getInputStream();
            if (in == null) return toReturn;   //Not found
        } catch (FileNotFoundException e) {
            return toReturn;
        }
        String s;
        try {
            s = IOUtils.toString(in);
        } catch(IOException e ){
            return toReturn;
        }

        String[] split = s.split("\n");
        int count = 0;
        for( String str : split ){
            if(!str.contains("port")) continue;
            System.out.println(str);
            String[] line = str.split("\\s+");
            for( String token : line ){
                try{
                    toReturn[count] = Integer.parseInt(token);
                    count++;
                }catch(NumberFormatException e ){ }
            }
            if(count == 2 ) return toReturn;
        }

        return toReturn;  //No port configuration?
    }
}