NoSuchMethodError使用dropwizard websocket jee7捆绑服务器

时间：2017-08-31 17:41:03

标签： java jetty dropwizard java-websocket jsr356

我正在使用Dropwizard作为REST服务器，使用dropwizard-websocket-jee7-bundle来启用websockets。
对于websocket服务器，我使用了this example 测试websocket服务器独立工作正常，但与Dropwizard结合使用，当客户端尝试连接（到ws：// localhost：port / actions）时，它会收到500内部服务器错误（下面的错误日志）。
我猜测有一些不好或缺少的配置，但我无法确定我们的位置。

ServerExample：

package com.example;

import static org.eclipse.jetty.servlets.CrossOriginFilter.ALLOWED_HEADERS_PARAM;
import static org.eclipse.jetty.servlets.CrossOriginFilter.ALLOWED_METHODS_PARAM;
import static org.eclipse.jetty.servlets.CrossOriginFilter.ALLOWED_ORIGINS_PARAM;
import static org.eclipse.jetty.servlets.CrossOriginFilter.ALLOW_CREDENTIALS_PARAM;
import java.util.EnumSet;
import javax.servlet.DispatcherType;
import javax.servlet.FilterRegistration;
import org.eclipse.jetty.servlets.CrossOriginFilter;
import com.example.health.SearchHealthCheck;
import com.example.resources.TestFind;
import be.tomcools.dropwizard.websocket.WebsocketBundle;
import io.dropwizard.Application;
import io.dropwizard.setup.Bootstrap;
import io.dropwizard.setup.Environment;
import com.example.websocket.DeviceWebSocketServer;

public class ServerExample extends Application<ServerExampleConfiguration> {
    private WebsocketBundle websocket = new WebsocketBundle();

    public static void main(String[] args) throws Exception {
        new ServerExample().run(args);
    }

    @Override
    public String getName() {
        return "com.example";
    }

    @Override
    public void initialize(Bootstrap<ServerExampleConfiguration> bootstrap) {
        super.initialize(bootstrap);
        bootstrap.addBundle(websocket);
    }

    @Override
    public void run(ServerExampleConfiguration configuration, Environment environment) throws Exception {
        System.setProperty("sun.net.http.allowRestrictedHeaders", "true");
        FilterRegistration.Dynamic filter = environment.servlets().addFilter("CORSFilter", CrossOriginFilter.class);
        filter.setInitParameter(ALLOWED_METHODS_PARAM, "OPTIONS,POST,GET");
        filter.setInitParameter(ALLOWED_ORIGINS_PARAM, "*");
        filter.setInitParameter(ALLOWED_HEADERS_PARAM, "Origin,Content-Type,Accept,X-Requested-With");
        filter.setInitParameter(ALLOW_CREDENTIALS_PARAM, "true");
        filter.addMappingForUrlPatterns(EnumSet.allOf(DispatcherType.class), true, "/*");

        environment.jersey().register(new TestFind());
        environment.healthChecks().register("search", new SearchHealthCheck());

        //Annotated endpoint
        websocket.addEndpoint(DeviceWebSocketServer.class);
    }

}

DeviceWebSocketServer：

package com.example.websocket;

import javax.websocket.OnClose;
import javax.websocket.OnError;
import javax.websocket.OnMessage;
import javax.websocket.OnOpen;
import javax.websocket.Session;
import javax.websocket.server.ServerEndpoint;
import javax.enterprise.context.ApplicationScoped;
import javax.inject.Inject;
import java.io.StringReader;
import javax.json.Json;
import javax.json.JsonObject;
import javax.json.JsonReader;
import com.example.model.Device;
import java.util.logging.Level;
import java.util.logging.Logger;
@ApplicationScoped    
@ServerEndpoint("/actions")
public class DeviceWebSocketServer {

    @Inject
    private DeviceSessionHandler sessionHandler;

    @OnOpen
    public void open(Session session) {
        sessionHandler.addSession(session);
    }

    @OnClose
    public void close(Session session) {
        sessionHandler.removeSession(session);
    }

    @OnError
    public void onError(Throwable error) {
        Logger.getLogger(DeviceWebSocketServer.class.getName()).log(Level.SEVERE, null, error);
    }

    @OnMessage
    public void handleMessage(String message, Session session) {
        try (JsonReader reader = Json.createReader(new StringReader(message))) {
            JsonObject jsonMessage = reader.readObject();

            if ("add".equals(jsonMessage.getString("action"))) {
                Device device = new Device();
                device.setName(jsonMessage.getString("name"));
                device.setDescription(jsonMessage.getString("description"));
                device.setType(jsonMessage.getString("type"));
                device.setStatus("Off");
                sessionHandler.addDevice(device);
            }

            if ("remove".equals(jsonMessage.getString("action"))) {
                int id = (int) jsonMessage.getInt("id");
                sessionHandler.removeDevice(id);
            }

            if ("toggle".equals(jsonMessage.getString("action"))) {
                int id = (int) jsonMessage.getInt("id");
                sessionHandler.toggleDevice(id);
            }
        }
    }
}

DeviceSessionHandler：

package com.example.websocket;

import javax.enterprise.context.ApplicationScoped;
import javax.json.JsonObject;
import javax.json.spi.JsonProvider;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.websocket.Session;
import com.example.model.Device;

@ApplicationScoped
public class DeviceSessionHandler {

    private int deviceId = 0;
    private final Set<Session> sessions = new HashSet<>();
    private final Set<Device> devices = new HashSet<>();

    public void addSession(Session session) {
        sessions.add(session);
        for (Device device : devices) {
            JsonObject addMessage = createAddMessage(device);
            sendToSession(session, addMessage);
        }
    }

    public void removeSession(Session session) {
        sessions.remove(session);
    }
    public List<Device> getDevices() {
        return new ArrayList<>(devices);
    }

    public void addDevice(Device device) {
        device.setId(deviceId);
        devices.add(device);
        deviceId++;
        JsonObject addMessage = createAddMessage(device);
        sendToAllConnectedSessions(addMessage);
    }

    public void removeDevice(int id) {
        Device device = getDeviceById(id);
        if (device != null) {
            devices.remove(device);
            JsonProvider provider = JsonProvider.provider();
            JsonObject removeMessage = provider.createObjectBuilder()
                    .add("action", "remove")
                    .add("id", id)
                    .build();
            sendToAllConnectedSessions(removeMessage);
        }
    }

    public void toggleDevice(int id) {
        JsonProvider provider = JsonProvider.provider();
        Device device = getDeviceById(id);
        if (device != null) {
            if ("On".equals(device.getStatus())) {
                device.setStatus("Off");
            } else {
                device.setStatus("On");
            }
            JsonObject updateDevMessage = provider.createObjectBuilder()
                    .add("action", "toggle")
                    .add("id", device.getId())
                    .add("status", device.getStatus())
                    .build();
            sendToAllConnectedSessions(updateDevMessage);
        }
    }

    private Device getDeviceById(int id) {
        for (Device device : devices) {
            if (device.getId() == id) {
                return device;
            }
        }
        return null;
    }

    private JsonObject createAddMessage(Device device) {
        JsonProvider provider = JsonProvider.provider();
        JsonObject addMessage = provider.createObjectBuilder()
                .add("action", "add")
                .add("id", device.getId())
                .add("name", device.getName())
                .add("type", device.getType())
                .add("status", device.getStatus())
                .add("description", device.getDescription())
                .build();
        return addMessage;
    }

    private void sendToAllConnectedSessions(JsonObject message) {
        for (Session session : sessions) {
            sendToSession(session, message);
        }
    }

    private void sendToSession(Session session, JsonObject message) {
        try {
            session.getBasicRemote().sendText(message.toString());
        } catch (IOException ex) {
            sessions.remove(session);
            Logger.getLogger(DeviceSessionHandler.class.getName()).log(Level.SEVERE, null, ex);
        }
    }
}

依赖关系：

<dependencies>
    <dependency>
        <groupId>com.sun.xml.bind</groupId>
        <artifactId>jaxb-impl</artifactId>
        <version>2.2.7</version>
    </dependency>
    <dependency>
        <groupId>org.apache.jena</groupId>
        <artifactId>jena-arq</artifactId>
        <version>3.1.0</version>
    </dependency>
    <dependency>
        <groupId>io.dropwizard</groupId>
        <artifactId>dropwizard-core</artifactId>
        <version>1.0.5</version>
    </dependency>
    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-databind</artifactId>
        <version>2.7.8</version>
    </dependency>
    <dependency>
        <groupId>javax.websocket</groupId>
        <artifactId>javax.websocket-api</artifactId>
        <version>1.1</version>
    </dependency>
    <dependency>
        <groupId>javax.json</groupId>
        <artifactId>javax.json-api</artifactId>
        <version>1.1</version>
    </dependency><dependency>
        <groupId>javax.enterprise</groupId>
        <artifactId>cdi-api</artifactId>
        <version>2.0</version>
        <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>be.tomcools</groupId>
      <artifactId>dropwizard-websocket-jee7-bundle</artifactId>
      <version>1.1.0</version>
    </dependency>
</dependencies>

错误日志：

WARN  [2017-08-31 16:55:46,863] org.eclipse.jetty.servlet.ServletHandler: Error for /actions
! java.lang.NoSuchMethodError: org.eclipse.jetty.io.AbstractConnection.<init>(Lorg/eclipse/jetty/io/EndPoint;Ljava/util/concurrent/Executor;Z)V
! at org.eclipse.jetty.websocket.common.io.AbstractWebSocketConnection.<init>(AbstractWebSocketConnection.java:225)
! at org.eclipse.jetty.websocket.server.WebSocketServerConnection.<init>(WebSocketServerConnection.java:41)
! at org.eclipse.jetty.websocket.server.WebSocketServerFactory.upgrade(WebSocketServerFactory.java:520)
! at org.eclipse.jetty.websocket.server.WebSocketServerFactory.acceptWebSocket(WebSocketServerFactory.java:186)
! at org.eclipse.jetty.websocket.server.WebSocketUpgradeFilter.doFilter(WebSocketUpgradeFilter.java:206)
! at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1676)
! at io.dropwizard.servlets.ThreadNameFilter.doFilter(ThreadNameFilter.java:34)
! at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1676)
! at io.dropwizard.jersey.filter.AllowedMethodsFilter.handle(AllowedMethodsFilter.java:50)
! at io.dropwizard.jersey.filter.AllowedMethodsFilter.doFilter(AllowedMethodsFilter.java:44)
! at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1676)
! at org.eclipse.jetty.servlets.CrossOriginFilter.handle(CrossOriginFilter.java:308)
! at org.eclipse.jetty.servlets.CrossOriginFilter.doFilter(CrossOriginFilter.java:262)
! at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1676)
! at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:581)
! at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1174)
! at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:511)
! at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1106)
! at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
! at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:134)
! at com.codahale.metrics.jetty9.InstrumentedHandler.handle(InstrumentedHandler.java:240)
! at io.dropwizard.jetty.RoutingHandler.handle(RoutingHandler.java:51)
! at org.eclipse.jetty.server.handler.gzip.GzipHandler.handle(GzipHandler.java:459)
! at io.dropwizard.jetty.BiDiGzipHandler.handle(BiDiGzipHandler.java:68)
! at org.eclipse.jetty.server.handler.RequestLogHandler.handle(RequestLogHandler.java:56)
! at org.eclipse.jetty.server.handler.StatisticsHandler.handle(StatisticsHandler.java:169)
! at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:134)
! at org.eclipse.jetty.server.Server.handle(Server.java:524)
! at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:319)
! at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:253)
! at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:273)
! at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:95)
! at org.eclipse.jetty.io.SelectChannelEndPoint$2.run(SelectChannelEndPoint.java:93)
! at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.executeProduceConsume(ExecuteProduceConsume.java:303)
! at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceConsume(ExecuteProduceConsume.java:148)
! at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:136)
! at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:671)
! at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:589)
! at java.lang.Thread.run(Thread.java:745)
0:0:0:0:0:0:0:1 - - [31/ago/2017:16:55:46 +0000] "GET /actions HTTP/1.1" 500 245 "-" "-" 47

已编辑：已添加依赖项列表。

1 个答案:

答案 0 :(得分：0)

将我使用的dropwizard版本降级到捆绑包中的最后一个报告版本（0.9.1）并且此错误消失了（虽然我现在有一个空指针异常。将打开一个关于该错误的新问题。）

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