我正在尝试使用异步响应构建REST Web服务。
我在网上查看了这个错误,但是,没有一个解决方案对我有用。我不确定如何去做。
这是REST服务的代码,它有AsyncResponse和@Suspended
,它们取自pom.xml
中指定的jar文件,我将在下面提供。问题是,在部署战争时,我得到一个例外:
java.lang.AbstractMethodError: javax.ws.rs.core.UriBuilder.uri(Ljava/lang/String;)Ljavax/ws/rs/core/UriBuilder;
javax.ws.rs.core.UriBuilder.fromUri(UriBuilder.java:119)
com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:651)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
note The full stack trace of the root cause is available in the Apache Tomcat/7.0.50 logs
我的课程如下:
package com.crudapp;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import javax.annotation.Generated;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.QueryParam;
import javax.ws.rs.core.Response;
//import javax.ws.rs.core.UriBuilder;
import org.json.JSONArray;
import org.json.JSONObject;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.google.gson.Gson;
import com.mysql.jdbc.StringUtils;
import dao.User;
import dao.UserDAO;
import dao.UserDAOImpl;
import javax.ws.rs.container.AsyncResponse;
import javax.ws.rs.container.Suspended;
@Path("/crudpath")
public class EntityResource {
private final ClassPathXmlApplicationContext ctx = new ClassPathXmlApplicationContext("/spring.xml");
UserDAO userdao = null;
private final int numOfThreads = 10;
private final ExecutorService executorService = Executors.newFixedThreadPool(numOfThreads);
// userdao.getUsers("118");
//ctx.close();
@GET
@Produces("application/json")
public Response getTupleFromDBasJSON(@QueryParam("param1") String userid, @Suspended final AsyncResponse asyncresponse ){
if(StringUtils.isNullOrEmpty(userid))
throw new ServiceException("Userid passed to the REST service /crudpath is null or empty");
userdao = (userdao==null)?
ctx.getBean("userDAO", UserDAOImpl.class)
: userdao;
Gson gson = new Gson();
Future<List<User>> futures = executorService.submit(new DAOTaskHandlerThread(userid));
List <User> users = new ArrayList<User>();
if(futures.isDone())
{
try{
users = futures.get();
if(users!= null)
return Response.status(200).entity( gson.toJson(users).toString()).build();
}
catch(Exception ex)
{
throw new ServiceException(ex);
}
}
return Response.status(200).entity(new ArrayList<User>().toString()).build();
/*// crrate a new thread.. call the DAO .. returns the result from here.
JSONObject jsonObject = new JSONObject();
jsonObject.put("key", "value");
return Response.status(200).entity( jsonObject.toString()).build();*/
}
private class DAOTaskHandlerThread implements Callable<List<User>>{
//private UserDAO userDAO;
private String userid;
private DAOTaskHandlerThread(//UserDAO userDAO,
String useridpassed){
///this.userDAO= userDAO;
userid= useridpassed;
}
@Override
public List<User> call() throws Exception {
// TODO Auto-generated method stub
return userdao.getUsers(userid);
}
}
}
我的maven pom.xml
文件如下:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>RESTJerseyExample</groupId>
<artifactId>RESTJerseyExample</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<build>
<sourceDirectory>src</sourceDirectory>
<plugins>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>2.4</version>
<configuration>
<warSourceDirectory>WebContent</warSourceDirectory>
<failOnMissingWebXml>false</failOnMissingWebXml>
</configuration>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
<!-- spring framework just added -->
<properties>
<java-version>1.7</java-version>
<org.springframework-version>4.0.3.RELEASE</org.springframework-version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${org.springframework-version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${org.springframework-version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>${org.springframework-version}</version>
<type>jar</type>
<scope>compile</scope>
</dependency>
<!-- spring framework just added ends here -->
<dependency>
<groupId>asm</groupId>
<artifactId>asm</artifactId>
<version>3.3.1</version>
</dependency>
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-bundle</artifactId>
<version>1.19</version>
</dependency>
<dependency>
<groupId>org.json</groupId>
<artifactId>json</artifactId>
<version>20140107</version>
</dependency>
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-server</artifactId>
<version>1.19</version>
</dependency>
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-core</artifactId>
<version>1.19</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-dbcp2</artifactId>
<version>2.0</version>
</dependency>
<!-- used for httpclient library -->
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.4</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.3.2</version>
</dependency>
<!-- for async response -->
<dependency>
<groupId>javax.ws.rs</groupId>
<artifactId>javax.ws.rs-api</artifactId>
<version>2.0-m12</version>
</dependency>
</dependencies>
</project>
答案 0 :(得分:54)
uri
是UriBuilder
中的抽象方法,因此您需要实现此方法。此方法(带String
参数)来自JAX-RS规范的版本2.0
。
您正在尝试将JAX-RS 2.0与Jersey 1. *一起使用。相反,您需要使用实现JAX-RS 2.0的Jersey 2. *并包含uri
方法的实现。
在pom.xml
中,您可以删除这些依赖项:
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-bundle</artifactId>
<version>1.19</version>
</dependency>
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-server</artifactId>
<version>1.19</version>
</dependency>
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-core</artifactId>
<version>1.19</version>
</dependency>
<dependency>
<groupId>javax.ws.rs</groupId>
<artifactId>javax.ws.rs-api</artifactId>
<version>2.0-m12</version>
</dependency>
并使用这些依赖项:
<dependency>
<groupId>org.glassfish.jersey.core</groupId>
<artifactId>jersey-server</artifactId>
<version>2.17</version>
</dependency>
<dependency>
<groupId>org.glassfish.jersey.containers</groupId>
<artifactId>jersey-container-servlet-core</artifactId>
<version>2.17</version>
</dependency>
使用此uri
方法在jersey-common
的{{3}}课程中实施。
修改强>:
您需要在web.xml
中将servlet com.sun.jersey.spi.container.servlet.ServletContainer
更改为org.glassfish.jersey.servlet.ServletContainer
和init-param
从com.sun.jersey.config.property.packages
更改为jersey.config.server.provider.packages
答案 1 :(得分:8)
我想在这篇文章中添加一个答案。我今天遇到了类似的问题,发现根本原因是另一个依赖的jar,内部使用较旧版本的Jersey / JAX-RS 。
修复之前我的POM是:
<jersey.version>2.17</jersey.version>
...
<dependency>
<groupId>org.glassfish.jersey.core</groupId>
<artifactId>jersey-server</artifactId>
<version>${jersey.version}</version>
</dependency>
<dependency>
<groupId>org.glassfish.jersey.containers</groupId>
<artifactId>jersey-container-servlet-core</artifactId>
<version>${jersey.version}</version>
</dependency>
<dependency>
<groupId>com.ci.wrapper</groupId>
<artifactId>client-wrapper</artifactId>
<version>${clients-wrapper.version}</version>
<exclusions>
<exclusion>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>com.api.commons</groupId>
<artifactId>transferobjects</artifactId>
<version>3.0.2</version>
</dependency>
问题在于“com.ci.wrapper”和“com.api.commons”。 他们包括两个不同的JAR的BraveJersey和org.apache.cxf.cxf-rt-frontend-jaxrs(2.5.1),它们使用Jersey和JAX-RS 1.X版本。
排除嵌套的jar并添加较新版本的BraveJersey2 / org.apache.cxf.cxf-rt-frontend-jaxrs(3.1.5)后,它得到了解决。
<dependency>
<groupId>com.api.commons</groupId>
<artifactId>transferobjects</artifactId>
<version>3.0.2</version>
<exclusions>
<exclusion>
<artifactId>cxf-rt-frontend-jaxrs</artifactId>
<groupId>org.apache.cxf</groupId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.apache.cxf</groupId>
<artifactId>cxf-rt-frontend-jaxrs</artifactId>
<version>3.1.5</version>
</dependency>
<dependency>
<groupId>com.ci.wrapper</groupId>
<artifactId>client-wrapper</artifactId>
<version>${clients-wrapper.version}</version>
<exclusions>
<exclusion>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
</exclusion>
<exclusion>
<artifactId>brave-jersey</artifactId>
<groupId>com.github.kristofa</groupId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>com.github.kristofa</groupId>
<artifactId>brave-jersey2</artifactId>
<version>2.4.2</version>
</dependency>
如果您遇到类似问题,请检查项目或jar的包含是否可能使用不兼容的Jersey / Jax-RS版本。
答案 2 :(得分:3)
当我尝试在我的某个项目中使用库(自定义构建)时,我遇到了这个问题。 所以问题是由于com.sun.jersey依赖项不匹配而发生的。我的项目是使用泽西版本2.15,而自定义库给我的com.sun.jersey传递版本1.17。
那么如何找到这样的问题呢。
使用gradle dependencies
任务找出依赖项(它提供嵌套级别结果,这意味着还将显示所有传递依赖项)
确定导致依赖关系的问题后。在项目中添加所需的依赖项时排除它们。
例如
httpRestClient是我想在我的项目中使用的自定义库的名称。
所以这是我添加依赖项的方式,同时排除了组'com.sun.jersey'
的冲突依赖关系
compile(httpRestClient) {
exclude group: 'com.sun.jersey'
}
通过这种方式,您可以使用任何库并排除冲突的库。
感谢。
答案 3 :(得分:1)
在我的情况下,需要删除 cxf-rt-frontend-jaxrs 和 httpclint jar的组合以解决此问题。这两个jar都有类javax.ws.rs.core.UriBuilder,这个类的多个版本引起了这个问题。
我的pom在移除它们之后对这两个罐子具有传递依赖性。
enter code here
<exclusion>
<groupId>org.apache.cxf</groupId>
<artifactId>cxf-rt-frontend-jaxrs</artifactId>
</exclusion>
<exclusion>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
</exclusion>
答案 4 :(得分:1)
在我们的案例中,罪魁祸首是这种依赖
<dependency>
<groupId>org.apache.wink</groupId>
<artifactId>wink-common</artifactId>
<version>1.0-incubating</version>
</dependency>