Java Can'；t让远程EJB在Wildfly上使用EJB客户端API

我目前正努力让远程EJB调用在wildfly（8.x和9.x）上工作

详细地说，它是关于使用EJB客户端API方法从独立客户端应用程序（而不是从另一个应用服务器）进行远程调用。远程命名方法适合我，但不适用于我的场景，因为我需要使用客户端拦截器将上下文数据传递给服务器端拦截器进行远程调用

但现在，我尝试使用客户端API进行远程调用，以用于一个简单的示例。因此，我尝试了github（）上提供的远程ejb调用快速启动。关键是，此快速启动引发的错误与我在简单示例应用程序上的错误相同。以下是我申请的一些细节：

我的远程界面：

package test.ejb;

public interface HelloRemote {
  String greet(String name);
}

package test.ejb;
import javax.ejb.Remote;
import javax.ejb.Stateless;

@Stateless(name = "Hello")
@Remote(HelloRemote.class)
public class HelloBean implements HelloRemote {

  public String greet(String name) {
    return "Hello " + name;
  }
}

import java.util.Properties;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import org.jboss.ejb.client.EJBClientContext;
import test.ejb.HelloRemote;

public class Main {
  public static void main(String[] args) throws Exception {
    Properties props = new Properties();
    props.put(Context.URL_PKG_PREFIXES, "org.jboss.ejb.client.naming");
    Context context = new InitialContext(props);

    String jndiLookup = "ejb:/ejb-test-backend.jar/Hello!" + HelloRemote.class.getName();
    HelloRemote hello = (HelloRemote) context.lookup(jndiLookup);
    System.out.println(hello.greet("World"));
  }
}

endpoint.name=client-endpoint
remote.connectionprovider.create.options.org.xnio.Options.SSL_ENABLED=false

remote.connections=default
remote.connection.default.host=localhost
remote.connection.default.port=8080
remote.connection.default.connect.options.org.xnio.Options.SASL_POLICY_NOANONYMOUS=false

Properties props = new Properties();
props.put(Context.INITIAL_CONTEXT_FACTORY, "org.jboss.naming.remote.client.InitialContextFactory");
props.put(Context.PROVIDER_URL, "http-remoting://127.0.0.1:8080");
props.put("jboss.naming.client.ejb.context", true);
props.put(Context.URL_PKG_PREFIXES, "org.jboss.ejb.client.naming");
props.put("jboss.naming.client.connect.options.org.xnio.Options.SASL_POLICY_NOPLAINTEXT", "false");
Context context = new InitialContext(props);

String jndiLookup = "/ejb-test-backend.jar/Hello!" + HelloRemote.class.getName();
HelloRemote hello = (HelloRemote) context.lookup(jndiLookup);
System.out.println(hello.greet("World"));

Hello World

我的Bean实现：

package test.ejb;

public interface HelloRemote {
  String greet(String name);
}

package test.ejb;
import javax.ejb.Remote;
import javax.ejb.Stateless;

@Stateless(name = "Hello")
@Remote(HelloRemote.class)
public class HelloBean implements HelloRemote {

  public String greet(String name) {
    return "Hello " + name;
  }
}

import java.util.Properties;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import org.jboss.ejb.client.EJBClientContext;
import test.ejb.HelloRemote;

public class Main {
  public static void main(String[] args) throws Exception {
    Properties props = new Properties();
    props.put(Context.URL_PKG_PREFIXES, "org.jboss.ejb.client.naming");
    Context context = new InitialContext(props);

    String jndiLookup = "ejb:/ejb-test-backend.jar/Hello!" + HelloRemote.class.getName();
    HelloRemote hello = (HelloRemote) context.lookup(jndiLookup);
    System.out.println(hello.greet("World"));
  }
}

endpoint.name=client-endpoint
remote.connectionprovider.create.options.org.xnio.Options.SSL_ENABLED=false

remote.connections=default
remote.connection.default.host=localhost
remote.connection.default.port=8080
remote.connection.default.connect.options.org.xnio.Options.SASL_POLICY_NOANONYMOUS=false

Properties props = new Properties();
props.put(Context.INITIAL_CONTEXT_FACTORY, "org.jboss.naming.remote.client.InitialContextFactory");
props.put(Context.PROVIDER_URL, "http-remoting://127.0.0.1:8080");
props.put("jboss.naming.client.ejb.context", true);
props.put(Context.URL_PKG_PREFIXES, "org.jboss.ejb.client.naming");
props.put("jboss.naming.client.connect.options.org.xnio.Options.SASL_POLICY_NOPLAINTEXT", "false");
Context context = new InitialContext(props);

String jndiLookup = "/ejb-test-backend.jar/Hello!" + HelloRemote.class.getName();
HelloRemote hello = (HelloRemote) context.lookup(jndiLookup);
System.out.println(hello.greet("World"));

Hello World

bean的远程视图已在服务器上正确注册（在导出命名空间中）：

---

下面是客户端：

我的主课：

package test.ejb;

public interface HelloRemote {
  String greet(String name);
}

package test.ejb;
import javax.ejb.Remote;
import javax.ejb.Stateless;

@Stateless(name = "Hello")
@Remote(HelloRemote.class)
public class HelloBean implements HelloRemote {

  public String greet(String name) {
    return "Hello " + name;
  }
}

import java.util.Properties;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import org.jboss.ejb.client.EJBClientContext;
import test.ejb.HelloRemote;

public class Main {
  public static void main(String[] args) throws Exception {
    Properties props = new Properties();
    props.put(Context.URL_PKG_PREFIXES, "org.jboss.ejb.client.naming");
    Context context = new InitialContext(props);

    String jndiLookup = "ejb:/ejb-test-backend.jar/Hello!" + HelloRemote.class.getName();
    HelloRemote hello = (HelloRemote) context.lookup(jndiLookup);
    System.out.println(hello.greet("World"));
  }
}

endpoint.name=client-endpoint
remote.connectionprovider.create.options.org.xnio.Options.SSL_ENABLED=false

remote.connections=default
remote.connection.default.host=localhost
remote.connection.default.port=8080
remote.connection.default.connect.options.org.xnio.Options.SASL_POLICY_NOANONYMOUS=false

Properties props = new Properties();
props.put(Context.INITIAL_CONTEXT_FACTORY, "org.jboss.naming.remote.client.InitialContextFactory");
props.put(Context.PROVIDER_URL, "http-remoting://127.0.0.1:8080");
props.put("jboss.naming.client.ejb.context", true);
props.put(Context.URL_PKG_PREFIXES, "org.jboss.ejb.client.naming");
props.put("jboss.naming.client.connect.options.org.xnio.Options.SASL_POLICY_NOPLAINTEXT", "false");
Context context = new InitialContext(props);

String jndiLookup = "/ejb-test-backend.jar/Hello!" + HelloRemote.class.getName();
HelloRemote hello = (HelloRemote) context.lookup(jndiLookup);
System.out.println(hello.greet("World"));

Hello World

jboss-ejb-client.properties（打包在jar/META\u-INF中）：

package test.ejb;

public interface HelloRemote {
  String greet(String name);
}

package test.ejb;
import javax.ejb.Remote;
import javax.ejb.Stateless;

@Stateless(name = "Hello")
@Remote(HelloRemote.class)
public class HelloBean implements HelloRemote {

  public String greet(String name) {
    return "Hello " + name;
  }
}

import java.util.Properties;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import org.jboss.ejb.client.EJBClientContext;
import test.ejb.HelloRemote;

public class Main {
  public static void main(String[] args) throws Exception {
    Properties props = new Properties();
    props.put(Context.URL_PKG_PREFIXES, "org.jboss.ejb.client.naming");
    Context context = new InitialContext(props);

    String jndiLookup = "ejb:/ejb-test-backend.jar/Hello!" + HelloRemote.class.getName();
    HelloRemote hello = (HelloRemote) context.lookup(jndiLookup);
    System.out.println(hello.greet("World"));
  }
}

endpoint.name=client-endpoint
remote.connectionprovider.create.options.org.xnio.Options.SSL_ENABLED=false

remote.connections=default
remote.connection.default.host=localhost
remote.connection.default.port=8080
remote.connection.default.connect.options.org.xnio.Options.SASL_POLICY_NOANONYMOUS=false

Properties props = new Properties();
props.put(Context.INITIAL_CONTEXT_FACTORY, "org.jboss.naming.remote.client.InitialContextFactory");
props.put(Context.PROVIDER_URL, "http-remoting://127.0.0.1:8080");
props.put("jboss.naming.client.ejb.context", true);
props.put(Context.URL_PKG_PREFIXES, "org.jboss.ejb.client.naming");
props.put("jboss.naming.client.connect.options.org.xnio.Options.SASL_POLICY_NOPLAINTEXT", "false");
Context context = new InitialContext(props);

String jndiLookup = "/ejb-test-backend.jar/Hello!" + HelloRemote.class.getName();
HelloRemote hello = (HelloRemote) context.lookup(jndiLookup);
System.out.println(hello.greet("World"));

Hello World

当我执行main方法时，会收到以下错误消息（在尝试上面提到的wildfly quickstart时也会发生同样的情况）：

当我使用远程命名方法时，一切都很好：

package test.ejb;

public interface HelloRemote {
  String greet(String name);
}

package test.ejb;
import javax.ejb.Remote;
import javax.ejb.Stateless;

@Stateless(name = "Hello")
@Remote(HelloRemote.class)
public class HelloBean implements HelloRemote {

  public String greet(String name) {
    return "Hello " + name;
  }
}

import java.util.Properties;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import org.jboss.ejb.client.EJBClientContext;
import test.ejb.HelloRemote;

public class Main {
  public static void main(String[] args) throws Exception {
    Properties props = new Properties();
    props.put(Context.URL_PKG_PREFIXES, "org.jboss.ejb.client.naming");
    Context context = new InitialContext(props);

    String jndiLookup = "ejb:/ejb-test-backend.jar/Hello!" + HelloRemote.class.getName();
    HelloRemote hello = (HelloRemote) context.lookup(jndiLookup);
    System.out.println(hello.greet("World"));
  }
}

endpoint.name=client-endpoint
remote.connectionprovider.create.options.org.xnio.Options.SSL_ENABLED=false

remote.connections=default
remote.connection.default.host=localhost
remote.connection.default.port=8080
remote.connection.default.connect.options.org.xnio.Options.SASL_POLICY_NOANONYMOUS=false

Properties props = new Properties();
props.put(Context.INITIAL_CONTEXT_FACTORY, "org.jboss.naming.remote.client.InitialContextFactory");
props.put(Context.PROVIDER_URL, "http-remoting://127.0.0.1:8080");
props.put("jboss.naming.client.ejb.context", true);
props.put(Context.URL_PKG_PREFIXES, "org.jboss.ejb.client.naming");
props.put("jboss.naming.client.connect.options.org.xnio.Options.SASL_POLICY_NOPLAINTEXT", "false");
Context context = new InitialContext(props);

String jndiLookup = "/ejb-test-backend.jar/Hello!" + HelloRemote.class.getName();
HelloRemote hello = (HelloRemote) context.lookup(jndiLookup);
System.out.println(hello.greet("World"));

Hello World

此处的输出（如预期的那样）：

package test.ejb;

public interface HelloRemote {
  String greet(String name);
}

package test.ejb;
import javax.ejb.Remote;
import javax.ejb.Stateless;

@Stateless(name = "Hello")
@Remote(HelloRemote.class)
public class HelloBean implements HelloRemote {

  public String greet(String name) {
    return "Hello " + name;
  }
}

import java.util.Properties;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import org.jboss.ejb.client.EJBClientContext;
import test.ejb.HelloRemote;

public class Main {
  public static void main(String[] args) throws Exception {
    Properties props = new Properties();
    props.put(Context.URL_PKG_PREFIXES, "org.jboss.ejb.client.naming");
    Context context = new InitialContext(props);

    String jndiLookup = "ejb:/ejb-test-backend.jar/Hello!" + HelloRemote.class.getName();
    HelloRemote hello = (HelloRemote) context.lookup(jndiLookup);
    System.out.println(hello.greet("World"));
  }
}

endpoint.name=client-endpoint
remote.connectionprovider.create.options.org.xnio.Options.SSL_ENABLED=false

remote.connections=default
remote.connection.default.host=localhost
remote.connection.default.port=8080
remote.connection.default.connect.options.org.xnio.Options.SASL_POLICY_NOANONYMOUS=false

Properties props = new Properties();
props.put(Context.INITIAL_CONTEXT_FACTORY, "org.jboss.naming.remote.client.InitialContextFactory");
props.put(Context.PROVIDER_URL, "http-remoting://127.0.0.1:8080");
props.put("jboss.naming.client.ejb.context", true);
props.put(Context.URL_PKG_PREFIXES, "org.jboss.ejb.client.naming");
props.put("jboss.naming.client.connect.options.org.xnio.Options.SASL_POLICY_NOPLAINTEXT", "false");
Context context = new InitialContext(props);

String jndiLookup = "/ejb-test-backend.jar/Hello!" + HelloRemote.class.getName();
HelloRemote hello = (HelloRemote) context.lookup(jndiLookup);
System.out.println(hello.greet("World"));

Hello World

那么，是否有人知道这里可能有什么问题，或者更好，有一个在Wildfly上使用EJB客户端API进行远程EJB调用的工作示例？

---

提前谢谢

和往常一样，我在写下问题并谈论它后不久就无意中发现了解决方案

此设置的问题是客户端API没有加载jboss-ejb-client.properties文件，而客户端API则缺少连接url

我不知道是否需要对这些属性的所需位置进行更改，或者我是否太笨而无法正确阅读，或者我是否只是修改了一个已损坏的教程。这根本没关系；）

解决方案是将属性文件toplevel放在类路径上，而不是放在JAR的META-INF目录中

---

它现在可以正常工作了，我可以注册客户端拦截器。

好的，我的调查还有一点进一步。似乎没有加载客户端属性文件，因此EJB定位器没有连接详细信息。我通过使用-Djboss.ejb.client.properties.file.path VM参数显式地将属性文件传递给进程发现了这一点。在这种情况下，调用成功！但是为什么这个属性文件不是从META-INF加载的呢？为什么快速入门。。。不工作？有什么变化吗？