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‎.gitattributes

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* text=auto eol=lf

‎.github/workflows/pipeline.yml

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name: PIPELINE
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on:
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push:
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branches:
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- 'master'
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workflow_dispatch:
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jobs:
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bump:
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uses: UnterrainerInformatik/bump-semver-workflow/.github/workflows/workflow.yml@master
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build:
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name: Build and publish to Maven Central 🚀
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needs: bump
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uses: UnterrainerInformatik/maven-central-workflow/.github/workflows/workflow.yml@master
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with:
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major_version: ${{ needs.bump.outputs.major_version }}
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minor_version: ${{ needs.bump.outputs.minor_version }}
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build_version: ${{ needs.bump.outputs.build_version }}
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maven_profiles: release-to-sonatype
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maven_args: -Dmaven.test.skip=true
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secrets:
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SONATYPE_USERNAME: ${{ secrets.SONATYPE_USERNAME }}
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SONATYPE_PASSWORD: ${{ secrets.SONATYPE_PASSWORD }}
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GPG_SECRET_KEY: ${{ secrets.GPG_SECRET_KEY }}
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GPG_OWNERTRUST: ${{ secrets.GPG_OWNERTRUST }}
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GPG_PASSPHRASE: ${{ secrets.GPG_PASSPHRASE }}

‎.gitignore

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2121

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# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
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hs_err_pid*
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replay_pid*
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/target/
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src/main/java/info/unterrainer/commons/jreutils/Information.java
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.settings/
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.classpath
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bin/
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dependency-reduced-pom.xml

‎.project

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<?xml version="1.0" encoding="UTF-8"?>
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<projectDescription>
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<name>websocket-client</name>
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<comment></comment>
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<projects>
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</projects>
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<buildSpec>
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<buildCommand>
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<name>org.eclipse.jdt.core.javabuilder</name>
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<arguments>
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</arguments>
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</buildCommand>
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<buildCommand>
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<name>org.eclipse.m2e.core.maven2Builder</name>
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<arguments>
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</arguments>
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</buildCommand>
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</buildSpec>
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<natures>
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<nature>org.eclipse.jdt.core.javanature</nature>
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<nature>org.eclipse.m2e.core.maven2Nature</nature>
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</natures>
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</projectDescription>

‎Information.template

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package @package@;
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public class Information {
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public static final String name = "@name@";
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public static final String buildTime = "@buildTime@";
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public static final String pomVersion = "@pomVersion@";
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}

‎pom.xml

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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
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<parent>
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<groupId>info.unterrainer.commons</groupId>
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<artifactId>parent-pom</artifactId>
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<version>1.0.2</version>
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</parent>
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<modelVersion>4.0.0</modelVersion>
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<artifactId>websocket-client</artifactId>
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<version>1.0.0</version>
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<name>WebsocketClient</name>
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<packaging>jar</packaging>
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<properties>
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<mainclass>info.unterrainer.commons.websocketclient.WebsocketClient</mainclass>
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<name>Websocket-Client</name>
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<package-path>info/unterrainer/commons/websocketclient</package-path>
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<packg-string>info.unterrainer.commons.websocketclient</packg-string>
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</properties>
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<dependencies>
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<dependency>
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<groupId>info.unterrainer.commons</groupId>
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<artifactId>oauth-token-manager</artifactId>
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<version>1.0.7</version>
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</dependency>
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<dependency>
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<groupId>javax.websocket</groupId>
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<artifactId>javax.websocket-api</artifactId>
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<version>1.1</version>
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</dependency>
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<dependency>
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<groupId>org.glassfish.tyrus</groupId>
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<artifactId>tyrus-client</artifactId>
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<version>2.1.3</version>
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</dependency>
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<dependency>
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<groupId>org.glassfish.tyrus</groupId>
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<artifactId>tyrus-container-grizzly-client</artifactId>
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<version>2.1.3</version>
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</dependency>
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</dependencies>
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</project>

‎src/main/java/info/unterrainer/websocketclient/SendingMessageWebsocketException.java

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package info.unterrainer.websocketclient;
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public class SendingMessageWebsocketException extends RuntimeException {
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public SendingMessageWebsocketException() {
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super();
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}
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public SendingMessageWebsocketException(String message) {
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super(message);
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}
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public SendingMessageWebsocketException(Throwable cause) {
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super(cause);
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}
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public SendingMessageWebsocketException(String message, Throwable cause) {
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super(message, cause);
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}
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private static final long serialVersionUID = 661400825771800217L;
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}

‎src/main/java/info/unterrainer/websocketclient/WebsocketConnection.java

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package info.unterrainer.websocketclient;
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import java.io.IOException;
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import java.net.URI;
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import java.util.List;
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import java.util.Map;
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import java.util.concurrent.CompletableFuture;
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import java.util.function.Consumer;
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import org.glassfish.tyrus.client.ClientManager;
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import info.unterrainer.oauthtokenmanager.LocalOauthTokens;
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import info.unterrainer.oauthtokenmanager.OauthTokenManager;
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import jakarta.websocket.ClientEndpointConfig;
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import jakarta.websocket.ClientEndpointConfig.Builder;
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import jakarta.websocket.CloseReason;
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import jakarta.websocket.Session;
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import lombok.Data;
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import lombok.EqualsAndHashCode;
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import lombok.RequiredArgsConstructor;
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import lombok.experimental.SuperBuilder;
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import lombok.extern.slf4j.Slf4j;
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@Slf4j
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@Data
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@RequiredArgsConstructor
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@SuperBuilder(toBuilder = true)
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@EqualsAndHashCode()
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public class WebsocketConnection implements AutoCloseable {
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private final String host;
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final Consumer<Session> onOpenHandler;
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final Consumer<String> onMessageHandler;
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final Consumer<Session> onCloseHandler;
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final Consumer<Throwable> onErrorHandler;
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final String keycloakHost;
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final String keycloakClient;
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final String keycloakClientSecret;
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final String keycloakUser;
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final String keycloakPassword;
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private WebsocketEndpoints endpoints;
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final CompletableFuture<Session> sessionReady = new CompletableFuture<>();
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public Session awaitOpen() {
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try {
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return sessionReady.get();
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} catch (Exception e) {
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throw new IllegalStateException("WebSocket did not open in time.", e);
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}
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}
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public void send(String message) {
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Session s = awaitOpen();
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try {
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s.getBasicRemote().sendText(message);
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} catch (Exception e) {
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log.error("Error sending message: ", e);
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throw new SendingMessageWebsocketException(String.format("Failed to send message [%s].", message), e);
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}
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log.debug("Sent message: " + message);
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}
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@Override
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public void close() {
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Session s = awaitOpen();
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try {
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s.close(new CloseReason(CloseReason.CloseCodes.NORMAL_CLOSURE, "Normal closure"));
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} catch (IOException e) {
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log.error("Error closing session.", e);
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}
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}
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public void establish() {
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String accessToken = null;
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ClientManager container = ClientManager.createClient();
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endpoints = new WebsocketEndpoints(this);
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Builder c = ClientEndpointConfig.Builder.create();
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if (keycloakHost != null) {
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OauthTokenManager tokenManager = new OauthTokenManager(keycloakHost, keycloakClient);
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LocalOauthTokens tokens = tokenManager.getTokensFromCredentials(keycloakClient, keycloakUser,
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keycloakPassword);
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accessToken = tokens.getAccessToken();
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String at = "Bearer " + accessToken;
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c.configurator(new ClientEndpointConfig.Configurator() {
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@Override
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public void beforeRequest(Map<String, List<String>> headers) {
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headers.put("Authorization", List.of(at));
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}
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});
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}
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ClientEndpointConfig config = c.build();
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try {
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container.connectToServer(endpoints, config, URI.create(host));
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} catch (Exception e) {
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log.error("Error connecting to WebSocket server: ", e);
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return;
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}
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log.info("WebSocket client connected to: {}", host);
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}
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}

‎src/main/java/info/unterrainer/websocketclient/WebsocketEndpoints.java

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package info.unterrainer.websocketclient;
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import jakarta.websocket.CloseReason;
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import jakarta.websocket.Endpoint;
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import jakarta.websocket.EndpointConfig;
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import jakarta.websocket.Session;
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import lombok.extern.slf4j.Slf4j;
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@Slf4j
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public class WebsocketEndpoints extends Endpoint {
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private final WebsocketConnection client;
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public WebsocketEndpoints(WebsocketConnection client) {
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this.client = client;
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}
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@Override
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public void onOpen(Session session, EndpointConfig config) {
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client.sessionReady.complete(session);
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log.info("Connected to server");
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// onOpen-Handler
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if (client.onOpenHandler != null) {
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try {
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client.onOpenHandler.accept(session);
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} catch (Exception e) {
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log.error("Error executing onOpen handler: ", e);
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}
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}
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// onMessage-Handler
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session.addMessageHandler(String.class, message -> {
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log.debug("Received message: " + message);
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client.awaitOpen();
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if (client.onMessageHandler != null) {
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try {
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client.onMessageHandler.accept(message);
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} catch (Exception e) {
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log.error("Error executing onMessage handler: ", e);
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}
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}
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});
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}
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@Override
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public void onClose(Session session, CloseReason closeReason) {
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Session s = client.awaitOpen();
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log.info("Disconnected from server: {}", closeReason);
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if (client.onCloseHandler != null) {
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try {
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client.onCloseHandler.accept(s);
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} catch (Exception e) {
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log.error("Error executing onClose handler: ", e);
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}
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}
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try {
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s.close();
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} catch (Exception e) {
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log.error("Error closing session: ", e);
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}
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}
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@Override
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public void onError(Session session, Throwable throwable) {
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client.awaitOpen();
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log.error("Error occurred: ", throwable);
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if (client.onErrorHandler != null) {
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try {
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client.onErrorHandler.accept(throwable);
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} catch (Exception e) {
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log.error("Error executing onError handler: ", e);
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}
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}
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}
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}

‎src/main/resources/log4j.properties

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# Set root logger level to DEBUG and its only appender to A1.
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log4j.rootLogger=DEBUG, A1
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# A1 is set to be a ConsoleAppender.
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log4j.appender.A1=org.apache.log4j.ConsoleAppender
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# A1 uses PatternLayout.
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log4j.appender.A1.layout=org.apache.log4j.PatternLayout
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log4j.appender.A1.layout.charset=UTF-8
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log4j.appender.A1.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n
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# Print only info for imported libraries.
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log4j.logger.io.netty=WARN
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log4j.logger.org.eclipse.milo=WARN

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