[英]Bind generated REST service interface implementation to servlet
我有一个wadl
文件,可以使用wadl2java
工具从其中生成REST
服务的对象和接口。 我有这些接口的实现,到目前为止一切都很好。 我还在web.xml
配置了servlet
,但是我无法使它正常工作。 现在,我的Web xml如下所示:
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<servlet>
<servlet-name>MyServlet</servlet-name>
<servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
<init-param>
<param-name>jersey.config.server.provider.classnames</param-name>
<param-value>com.foo.ws.RestServiceImpl</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>MyServlet</servlet-name>
<url-pattern>/*</url-pattern>
</servlet-mapping>
</web-app>
生成的rest接口如下所示:
package com.foo.schemas;
import javax.ws.rs.Consumes;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import com.foo.schemas.BarRequest;
import com.foo.schemas.BarResponse;
import com.foo.schemas.FooRequest;
import com.foo.schemas.FooResponse;
@Path("services")
public interface RestService {
@POST
@Consumes("application/xml")
@Produces("application/xml")
BarResponse getBar(BarRequest barRequest);
@POST
@Consumes("application/xml")
@Produces("application/xml")
FooResponse getFoo(FooRequest fooRequest);
}
它的实现:
package com.foo.ws;
import org.glassfish.jersey.server.ResourceConfig;
import com.foo.RestService;
import com.foo.schemas.BarRequest;
import com.foo.schemas.BarResponse;
import com.foo.schemas.FooRequest;
import com.foo.schemas.FooResponse;
public class RestServiceImpl extends ResourceConfig implements RestService {
public RestServiceImpl () {
register(new AbstractBinder() {
@Override
protected void configure() {
bind(RestServiceImpl.class).to(RestService.class);
}
});
}
@Override
BarResponse getBar(BarRequest barRequest) {
// Implementation omitted...
}
@Override
FooResponse getFoo(FooRequest FooRequest) {
// Implementation omitted...
}
}
我认为这看起来不错,但是当我启动Web服务时,出现以下HTTP ERROR 503
:
Problem accessing /my-web-service/. Reason:
org.glassfish.jersey.server.model.ModelValidationException: Validation of
the application resource model has failed during application initialization.
[[FATAL] A resource model has ambiguous (sub-)resource method for HTTP
method POST and input mime-types as defined by"@Consumes" and "@Produces"
annotations at Java methods public com.foo.schemas.BarResponse
com.foo.ws.RestServiceImpl.getBar(com.foo.schemas.BarRequest) and public
com.foo.schemas.FooResponse
com.foo.ws.RestServiceImpl.getFoo(com.foo.schemas.FooRequest) at matching
regular expression /services. These two methods produces and consumes
exactly the same mime-types and therefore their invocation as a resource
methods will always fail.;
source='org.glassfish.jersey.server.model.RuntimeResource@5690c2a8'
看起来接口和实现之间的绑定是正确的,但是我不太明白为什么会收到此错误? 是的,为@Consumes
和@Produces
批注定义了相同的MIME-types
的@Consumes
,但是wadl2java
是如何生成接口的? 我不知道如何解决此问题,servlet或wadl2java工具是否存在任何配置错误? 我一无所知,对此我的任何帮助都非常感激。
编辑-添加了wadl文件
<?xml version="1.0" encoding="UTF-8"?>
<application xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:foo="http://schemas.foo.com"
xsi:schemaLocation="http://wadl.dev.java.net/2009/02 http://www.w3.org/Submission/wadl/wadl.xsd"
xmlns="http://wadl.dev.java.net/2009/02">
<doc xml:lang="en">This wadl describes....</doc>
<grammars>
<include href="foo.xsd"/>
</grammars>
<resources base="/foo">
<resource path="services">
<method id="getBar" name="POST">
<doc xml:lang="en">Get all bars.</doc>
<request>
<representation mediaType="application/xml">
<param required="true" style="plain" id="barRequest" name="barRequest" type="foo:BarRequest"/>
</representation>
</request>
<response status="200">
<representation mediaType="application/xml">
<param required="true" style="plain" id="barResponse" name="barResponse" type="foo:BarResponse"/>
</representation>
</response>
</method>
<method id="getFoo" name="POST">
<doc xml:lang="en">Get all foos.</doc>
<request>
<representation mediaType="application/xml">
<param required="true" style="plain" id="fooRequest" name="fooRequest" type="foo:FooRequest"/>
</representation>
</request>
<response status="200">
<representation mediaType="application/xml">
<param required="true" style="plain" id="fooResponse" name="fooResponse" type="foo:FooResponse"/>
</representation>
</response>
</method>
</resource>
</resources>
问题是如何公开资源。
问题 -如果该资源被击中。 然后,Jersey无法理解要获取结果要调用哪个API。 是getBar()还是getFoo()
现在,更改取决于期望值(根据需求,是什么以及何时需要调用API)。 您必须相应地修改WADL,以确保每个资源都侦听唯一的路径/消费/生产类型。
@Path("services")
public interface RestService {
@POST
@Consumes("application/xml")
@Produces("application/xml")
BarResponse getBar(BarRequest barRequest);
@POST
@Consumes("application/xml")
@Produces("application/xml")
FooResponse getFoo(FooRequest fooRequest);
}
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