Add support of Jackson in Jersey

If Jackson is configured for the project, the `ObjectMapper` is now
reused and added in the Jersey's context.

Closes gh-4131

spring-boot-autoconfigure/pom.xml

@@ -130,6 +130,11 @@
 			<artifactId>jersey-spring3</artifactId>
 			<optional>true</optional>
 		</dependency>
+		<dependency>
+			<groupId>org.glassfish.jersey.media</groupId>
+			<artifactId>jersey-media-json-jackson</artifactId>
+			<optional>true</optional>
+		</dependency>
 		<dependency>
 			<groupId>commons-dbcp</groupId>
 			<artifactId>commons-dbcp</artifactId>

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/jersey/JerseyAutoConfiguration.java

@@ -26,15 +26,21 @@ import javax.servlet.ServletContext;
 import javax.servlet.ServletException;
 import javax.servlet.ServletRegistration;
 import javax.ws.rs.ApplicationPath;
+import javax.ws.rs.ext.ContextResolver;
+import javax.ws.rs.ext.Provider;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.glassfish.jersey.CommonProperties;
+import org.glassfish.jersey.jackson.JacksonFeature;
 import org.glassfish.jersey.server.ResourceConfig;
 import org.glassfish.jersey.servlet.ServletContainer;
 import org.glassfish.jersey.servlet.ServletProperties;
 
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.autoconfigure.AutoConfigureAfter;
 import org.springframework.boot.autoconfigure.AutoConfigureBefore;
 import org.springframework.boot.autoconfigure.AutoConfigureOrder;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
@@ -43,6 +49,7 @@ import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnWebApplication;
+import org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration;
 import org.springframework.boot.autoconfigure.web.DispatcherServletAutoConfiguration;
 import org.springframework.boot.context.embedded.FilterRegistrationBean;
 import org.springframework.boot.context.embedded.RegistrationBean;
@@ -73,6 +80,7 @@ import org.springframework.web.filter.RequestContextFilter;
 @ConditionalOnWebApplication
 @AutoConfigureOrder(Ordered.HIGHEST_PRECEDENCE)
 @AutoConfigureBefore(DispatcherServletAutoConfiguration.class)
+@AutoConfigureAfter(JacksonAutoConfiguration.class)
 @EnableConfigurationProperties(JerseyProperties.class)
 public class JerseyAutoConfiguration implements ServletContextAware {
 
@@ -84,10 +92,24 @@ public class JerseyAutoConfiguration implements ServletContextAware {
 	@Autowired
 	private ResourceConfig config;
 
+	@Autowired(required = false)
+	private ResourceConfigCustomizer customizer;
+
 	private String path;
 
 	@PostConstruct
 	public void path() {
+		resolveApplicationPath();
+		applyCustomConfig();
+	}
+
+	private void applyCustomConfig() {
+		if (this.customizer != null) {
+			this.customizer.customize(this.config);
+		}
+	}
+
+	private void resolveApplicationPath() {
 		if (StringUtils.hasLength(this.jersey.getApplicationPath())) {
 			this.path = parseApplicationPath(this.jersey.getApplicationPath());
 		}
@@ -193,6 +215,36 @@ public class JerseyAutoConfiguration implements ServletContextAware {
 			// will try and register a ContextLoaderListener which we don't need
 			servletContext.setInitParameter("contextConfigLocation", "<NONE>");
 		}
+	}
+
+	@ConditionalOnClass(JacksonFeature.class)
+	@Configuration
+	static class ObjectMapperResourceConfigCustomizer {
+
+		@Bean
+		public ResourceConfigCustomizer resourceConfigCustomizer() {
+			return new ResourceConfigCustomizer() {
+				@Override
+				public void customize(ResourceConfig config) {
+					config.register(JacksonFeature.class);
+					config.register(ObjectMapperContextResolver.class);
+				}
+			};
+		}
+
+		@Provider
+		static class ObjectMapperContextResolver
+				implements ContextResolver<ObjectMapper> {
+
+			@Autowired
+			private ObjectMapper objectMapper;
+
+			@Override
+			public ObjectMapper getContext(Class<?> type) {
+				return this.objectMapper;
+			}
+
+		}
 
 	}
 

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/jersey/ResourceConfigCustomizer.java

@@ -0,0 +1,34 @@
+/*
+ * Copyright 2012-2016 the original author or authors.
+ *
+ * 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.springframework.boot.autoconfigure.jersey;
+
+import org.glassfish.jersey.server.ResourceConfig;
+
+import org.springframework.context.annotation.Configuration;
+
+/**
+ * Callback for customizing the Jersey {@link Configuration}.
+ *
+ * @author Eddú Meléndez
+ * @since 1.4.0
+ * @see JerseyAutoConfiguration
+ */
+public interface ResourceConfigCustomizer {
+
+	void customize(ResourceConfig config);
+
+}

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/jersey/JerseyAutoConfigurationCustomObjectMapperProviderTests.java

@@ -0,0 +1,135 @@
+/*
+ * Copyright 2012-2016 the original author or authors.
+ *
+ * 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.springframework.boot.autoconfigure.jersey;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+import javax.ws.rs.ApplicationPath;
+import javax.ws.rs.GET;
+import javax.ws.rs.Path;
+
+import org.glassfish.jersey.server.ResourceConfig;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.PropertyPlaceholderAutoConfiguration;
+import org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration;
+import org.springframework.boot.autoconfigure.jersey.JerseyAutoConfigurationObjectMapperProviderTests.Application;
+import org.springframework.boot.autoconfigure.web.EmbeddedServletContainerAutoConfiguration;
+import org.springframework.boot.autoconfigure.web.ServerPropertiesAutoConfiguration;
+import org.springframework.boot.test.IntegrationTest;
+import org.springframework.boot.test.SpringApplicationConfiguration;
+import org.springframework.boot.test.TestRestTemplate;
+import org.springframework.context.annotation.Import;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.web.WebAppConfiguration;
+import org.springframework.web.client.RestTemplate;
+
+import static org.junit.Assert.assertEquals;
+
+/**
+ * @author Eddú Meléndez
+ */
+@RunWith(SpringJUnit4ClassRunner.class)
+@SpringApplicationConfiguration(Application.class)
+@IntegrationTest({ "server.port=0", "spring.jackson.serialization-inclusion=non_null" })
+@WebAppConfiguration
+public class JerseyAutoConfigurationCustomObjectMapperProviderTests {
+
+	@Value("${local.server.port}")
+	private int port;
+
+	private RestTemplate restTemplate = new TestRestTemplate();
+
+	@Test
+	public void contextLoads() {
+		ResponseEntity<String> response = this.restTemplate.getForEntity(
+				"http://localhost:" + this.port + "/rest/message", String.class);
+		assertEquals(HttpStatus.OK, response.getStatusCode());
+		assertEquals("{\"subject\":\"Jersey\"}", response.getBody());
+	}
+
+	@MinimalWebConfiguration
+	@ApplicationPath("/rest")
+	@Path("/message")
+	public static class Application extends ResourceConfig {
+
+		@GET
+		public Message message() {
+			return new Message("Jersey", null);
+		}
+
+		public Application() {
+			register(Application.class);
+		}
+
+		public static void main(String[] args) {
+			SpringApplication.run(Application.class, args);
+		}
+
+	}
+
+	public static class Message {
+
+		private String subject;
+
+		private String body;
+
+		public Message() {
+
+		}
+
+		public Message(String subject, String body) {
+			this.subject = subject;
+			this.body = body;
+		}
+
+		public String getSubject() {
+			return this.subject;
+		}
+
+		public void setSubject(String subject) {
+			this.subject = subject;
+		}
+
+		public String getBody() {
+			return this.body;
+		}
+
+		public void setBody(String body) {
+			this.body = body;
+		}
+	}
+
+	@Target(ElementType.TYPE)
+	@Retention(RetentionPolicy.RUNTIME)
+	@Documented
+	@Import({ EmbeddedServletContainerAutoConfiguration.class,
+			JacksonAutoConfiguration.class, ServerPropertiesAutoConfiguration.class,
+			JerseyAutoConfiguration.class, PropertyPlaceholderAutoConfiguration.class })
+	protected @interface MinimalWebConfiguration {
+	}
+
+}

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/jersey/JerseyAutoConfigurationObjectMapperProviderTests.java

@@ -0,0 +1,135 @@
+/*
+ * Copyright 2012-2016 the original author or authors.
+ *
+ * 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.springframework.boot.autoconfigure.jersey;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+import javax.ws.rs.ApplicationPath;
+import javax.ws.rs.GET;
+import javax.ws.rs.Path;
+
+import org.glassfish.jersey.server.ResourceConfig;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.PropertyPlaceholderAutoConfiguration;
+import org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration;
+import org.springframework.boot.autoconfigure.jersey.JerseyAutoConfigurationObjectMapperProviderTests.Application;
+import org.springframework.boot.autoconfigure.web.EmbeddedServletContainerAutoConfiguration;
+import org.springframework.boot.autoconfigure.web.ServerPropertiesAutoConfiguration;
+import org.springframework.boot.test.IntegrationTest;
+import org.springframework.boot.test.SpringApplicationConfiguration;
+import org.springframework.boot.test.TestRestTemplate;
+import org.springframework.context.annotation.Import;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.web.WebAppConfiguration;
+import org.springframework.web.client.RestTemplate;
+
+import static org.junit.Assert.assertEquals;
+
+/**
+ * @author Eddú Meléndez
+ */
+@RunWith(SpringJUnit4ClassRunner.class)
+@SpringApplicationConfiguration(Application.class)
+@IntegrationTest("server.port=0")
+@WebAppConfiguration
+public class JerseyAutoConfigurationObjectMapperProviderTests {
+
+	@Value("${local.server.port}")
+	private int port;
+
+	private RestTemplate restTemplate = new TestRestTemplate();
+
+	@Test
+	public void contextLoads() {
+		ResponseEntity<String> response = this.restTemplate.getForEntity(
+				"http://localhost:" + this.port + "/rest/message", String.class);
+		assertEquals(HttpStatus.OK, response.getStatusCode());
+		assertEquals("{\"subject\":\"Jersey\",\"body\":null}", response.getBody());
+	}
+
+	@MinimalWebConfiguration
+	@ApplicationPath("/rest")
+	@Path("/message")
+	public static class Application extends ResourceConfig {
+
+		@GET
+		public Message message() {
+			return new Message("Jersey", null);
+		}
+
+		public Application() {
+			register(Application.class);
+		}
+
+		public static void main(String[] args) {
+			SpringApplication.run(Application.class, args);
+		}
+
+	}
+
+	public static class Message {
+
+		private String subject;
+
+		private String body;
+
+		public Message() {
+
+		}
+
+		public Message(String subject, String body) {
+			this.subject = subject;
+			this.body = body;
+		}
+
+		public String getSubject() {
+			return this.subject;
+		}
+
+		public void setSubject(String subject) {
+			this.subject = subject;
+		}
+
+		public String getBody() {
+			return this.body;
+		}
+
+		public void setBody(String body) {
+			this.body = body;
+		}
+	}
+
+	@Target(ElementType.TYPE)
+	@Retention(RetentionPolicy.RUNTIME)
+	@Documented
+	@Import({ EmbeddedServletContainerAutoConfiguration.class,
+			JacksonAutoConfiguration.class, ServerPropertiesAutoConfiguration.class,
+			JerseyAutoConfiguration.class, PropertyPlaceholderAutoConfiguration.class })
+	protected @interface MinimalWebConfiguration {
+	}
+
+}