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Java example source code file (WeightResource.java)

This example Java source code file (WeightResource.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

compactmodelandgradient, exceptionmetered, get, path, pathparam, post, queryparam, response, sessionstorage, string, util, weightresource

The WeightResource.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.weights;

import com.codahale.metrics.annotation.ExceptionMetered;
import io.dropwizard.views.View;
import org.deeplearning4j.nn.api.Model;
import org.deeplearning4j.nn.gradient.Gradient;
import org.deeplearning4j.ui.storage.HistoryStorage;
import org.deeplearning4j.ui.storage.SessionStorage;
import org.deeplearning4j.ui.storage.def.ObjectType;
import org.deeplearning4j.ui.weights.beans.CompactModelAndGradient;

import javax.ws.rs.*;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import java.util.Collections;
import java.util.HashMap;
import java.util.concurrent.locks.ReentrantReadWriteLock;

 * Weight renderings
 * @author Adam Gibson
public class WeightResource {
    String path = "weights";
    private SessionStorage storage = SessionStorage.getInstance();

    public Response updated(@QueryParam("sid") String sessionId) {
        CompactModelAndGradient model = (CompactModelAndGradient) storage.getObject(sessionId, ObjectType.HISTOGRAM);
        if (model == null) {
            return Response.noContent().build();
        } else return Response.ok(Collections.singletonMap("status",true)).build();

    public Response data(@QueryParam("sid") String sessionId) {
        //initialized with empty data
        CompactModelAndGradient model = (CompactModelAndGradient) storage.getObject(sessionId, ObjectType.HISTOGRAM);

            if (model == null) {
                //initialize with empty
                return Response.ok(new HashMap<>()).build();

        return Response.ok(model).build();

    public Response update(CompactModelAndGradient modelAndGrad, @PathParam("path") String path, @QueryParam("sid") String sessionId) {

            storage.putObject(sessionId, ObjectType.HISTOGRAM, modelAndGrad);

            return Response.ok(Collections.singletonMap("status","ok")).build();


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