com.netflix.conductor.server.JerseyModule.java Source code

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Here is the source code for com.netflix.conductor.server.JerseyModule.java

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/**
 * Copyright 2016 Netflix, 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 com.netflix.conductor.server;

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

import javax.inject.Singleton;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletResponse;

import com.fasterxml.jackson.annotation.JsonInclude.Include;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.jaxrs.json.JacksonJsonProvider;
import com.google.inject.Provides;
import com.sun.jersey.api.core.PackagesResourceConfig;
import com.sun.jersey.api.core.ResourceConfig;
import com.sun.jersey.guice.JerseyServletModule;
import com.sun.jersey.guice.spi.container.servlet.GuiceContainer;

/**
 * 
 * @author Viren
 *
 */
public final class JerseyModule extends JerseyServletModule {

    @Override
    protected void configureServlets() {

        filter("/*").through(apiOriginFilter());

        Map<String, String> jerseyParams = new HashMap<>();
        jerseyParams.put("com.sun.jersey.config.feature.FilterForwardOn404", "true");
        jerseyParams.put("com.sun.jersey.config.property.WebPageContentRegex",
                "/(((webjars|api-docs|swagger-ui/docs|manage)/.*)|(favicon\\.ico))");
        jerseyParams.put(PackagesResourceConfig.PROPERTY_PACKAGES,
                "com.netflix.conductor.server.resources;io.swagger.jaxrs.json;io.swagger.jaxrs.listing");
        jerseyParams.put(ResourceConfig.FEATURE_DISABLE_WADL, "false");
        serve("/api/*").with(GuiceContainer.class, jerseyParams);
    }

    @Provides
    @Singleton
    public ObjectMapper objectMapper() {
        final ObjectMapper om = new ObjectMapper();
        om.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
        om.configure(DeserializationFeature.FAIL_ON_IGNORED_PROPERTIES, false);
        om.configure(DeserializationFeature.FAIL_ON_NULL_FOR_PRIMITIVES, false);
        om.setSerializationInclusion(Include.NON_NULL);
        om.setSerializationInclusion(Include.NON_EMPTY);
        return om;
    }

    @Provides
    @Singleton
    JacksonJsonProvider jacksonJsonProvider(ObjectMapper mapper) {
        return new JacksonJsonProvider(mapper);
    }

    @Provides
    @Singleton
    public Filter apiOriginFilter() {
        return new Filter() {

            @Override
            public void init(FilterConfig filterConfig) throws ServletException {
            }

            @Override
            public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
                    throws IOException, ServletException {
                HttpServletResponse res = (HttpServletResponse) response;
                if (!res.containsHeader("Access-Control-Allow-Origin")) {
                    res.setHeader("Access-Control-Allow-Origin", "*");
                }
                res.addHeader("Access-Control-Allow-Methods", "GET, POST, DELETE, PUT");
                res.addHeader("Access-Control-Allow-Headers", "Content-Type, api_key, Authorization");

                chain.doFilter(request, response);
            }

            @Override
            public void destroy() {
            }

        };
    }

    @Override
    public boolean equals(Object obj) {
        return obj != null && getClass().equals(obj.getClass());
    }

    @Override
    public int hashCode() {
        return getClass().hashCode();
    }

}