Add Jakarta EE compatible Socket Mode client ref: slackapi#919

bolt-jakarta-socket-mode/pom.xml

@@ -0,0 +1,97 @@
+<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>
+
+    <parent>
+        <groupId>com.slack.api</groupId>
+        <artifactId>slack-sdk-parent</artifactId>
+        <version>1.41.1-SNAPSHOT</version>
+    </parent>
+
+    <properties>
+        <tyrus-standalone-client.version>2.2.0</tyrus-standalone-client.version>
+        <jakarta.websocket-api.version>2.2.0</jakarta.websocket-api.version>
+    </properties>
+
+    <artifactId>bolt-jakarta-socket-mode</artifactId>
+    <version>1.41.1-SNAPSHOT</version>
+    <packaging>jar</packaging>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.slack.api</groupId>
+            <artifactId>slack-api-model</artifactId>
+            <version>${project.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>com.slack.api</groupId>
+            <artifactId>slack-api-client</artifactId>
+            <version>${project.version}</version>
+            <exclusions>
+                <exclusion>
+                    <groupId>javax.websocket</groupId>
+                    <artifactId>javax.websocket-api</artifactId>
+                </exclusion>
+                <exclusion>
+                    <groupId>org.glassfish.tyrus.bundles</groupId>
+                    <artifactId>tyrus-standalone-client</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+        <dependency>
+            <groupId>com.slack.api</groupId>
+            <artifactId>slack-jakarta-socket-mode-client</artifactId>
+            <version>${project.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>com.slack.api</groupId>
+            <artifactId>slack-app-backend</artifactId>
+            <version>${project.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>com.slack.api</groupId>
+            <artifactId>bolt</artifactId>
+            <version>${project.version}</version>
+        </dependency>
+
+        <dependency>
+            <groupId>jakarta.websocket</groupId>
+            <artifactId>jakarta.websocket-client-api</artifactId>
+            <version>${jakarta.websocket-api.version}</version>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.glassfish.tyrus.bundles</groupId>
+            <artifactId>tyrus-standalone-client</artifactId>
+            <version>${tyrus-standalone-client.version}</version>
+            <scope>provided</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.eclipse.jetty</groupId>
+            <artifactId>jetty-servlet</artifactId>
+            <version>${jetty-for-tests.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.eclipse.jetty</groupId>
+            <artifactId>jetty-server</artifactId>
+            <version>${jetty-for-tests.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.eclipse.jetty</groupId>
+            <artifactId>jetty-webapp</artifactId>
+            <version>${jetty-for-tests.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.eclipse.jetty.websocket</groupId>
+            <artifactId>websocket-server</artifactId>
+            <version>${jetty-for-tests.version}</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+</project>

bolt-jakarta-socket-mode/src/main/java/com/slack/api/bolt/jakarta_socket_mode/SocketModeApp.java

@@ -0,0 +1,212 @@
+package com.slack.api.bolt.jakarta_socket_mode;
+
+import com.google.gson.Gson;
+import com.google.gson.JsonElement;
+import com.slack.api.bolt.App;
+import com.slack.api.bolt.request.Request;
+import com.slack.api.bolt.response.Response;
+import com.slack.api.bolt.jakarta_socket_mode.request.SocketModeRequest;
+import com.slack.api.bolt.jakarta_socket_mode.request.SocketModeRequestParser;
+import com.slack.api.jakarta_socket_mode.JakartaSocketModeClientFactory;
+import com.slack.api.socket_mode.SocketModeClient;
+import com.slack.api.socket_mode.response.AckResponse;
+import com.slack.api.util.json.GsonFactory;
+import lombok.Builder;
+import lombok.Data;
+import lombok.extern.slf4j.Slf4j;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.function.Function;
+import java.util.function.Supplier;
+
+@Slf4j
+public class SocketModeApp {
+    private boolean clientStopped = true;
+    private final App app;
+    private final Supplier<SocketModeClient> clientFactory;
+    private SocketModeClient client;
+
+    private static final Function<ErrorContext, Response> DEFAULT_ERROR_HANDLER = (context) -> {
+        Exception e = context.getException();
+        log.error("Failed to handle a request: {}", e.getMessage(), e);
+        return null;
+    };
+
+    @Data
+    @Builder
+    public static class ErrorContext {
+        private Request<?> request;
+        private Exception exception;
+    }
+
+    // -------------------------------------------
+
+    private static void sendSocketModeResponse(
+            SocketModeClient client,
+            Gson gson,
+            SocketModeRequest req,
+            Response boltResponse
+    ) {
+        if (boltResponse.getBody() != null) {
+            Map<String, Object> response = new HashMap<>();
+            if (boltResponse.getContentType().startsWith("application/json")) {
+                response.put("envelope_id", req.getEnvelope().getEnvelopeId());
+                response.put("payload", gson.fromJson(boltResponse.getBody(), JsonElement.class));
+            } else {
+                response.put("envelope_id", req.getEnvelope().getEnvelopeId());
+                Map<String, Object> payload = new HashMap<>();
+                payload.put("text", boltResponse.getBody());
+                response.put("payload", payload);
+            }
+            client.sendSocketModeResponse(gson.toJson(response));
+        } else {
+            client.sendSocketModeResponse(new AckResponse(req.getEnvelope().getEnvelopeId()));
+        }
+    }
+
+    private static Supplier<SocketModeClient> buildSocketModeClientFactory(
+            App app,
+            String appToken,
+            Function<ErrorContext, Response> errorHandler
+    ) {
+        return () -> {
+            try {
+                final SocketModeClient client = JakartaSocketModeClientFactory.create(app.slack(), appToken);
+                final SocketModeRequestParser requestParser = new SocketModeRequestParser(app.config());
+                final Gson gson = GsonFactory.createSnakeCase(app.slack().getConfig());
+                client.addWebSocketMessageListener(message -> {
+                    long startMillis = System.currentTimeMillis();
+                    SocketModeRequest req = requestParser.parse(message);
+                    if (req != null) {
+                        try {
+                            Response boltResponse = app.run(req.getBoltRequest());
+                            if (boltResponse.getStatusCode() != 200) {
+                                log.warn("Unsuccessful Bolt app execution (status: {}, body: {})",
+                                        boltResponse.getStatusCode(), boltResponse.getBody());
+                                return;
+                            }
+                            sendSocketModeResponse(client, gson, req, boltResponse);
+                        } catch (Exception e) {
+                            ErrorContext context = ErrorContext.builder().request(req.getBoltRequest()).exception(e).build();
+                            Response errorResponse = errorHandler.apply(context);
+                            if (errorResponse != null) {
+                                sendSocketModeResponse(client, gson, req, errorResponse);
+                            }
+                        } finally {
+                            long spentMillis = System.currentTimeMillis() - startMillis;
+                            log.debug("Response time: {} milliseconds", spentMillis);
+                        }
+                    }
+                });
+                return client;
+            } catch (IOException e) {
+                log.error("Failed to start a new Socket Mode client (error: {})", e.getMessage(), e);
+                return null;
+            }
+        };
+    }
+
+    public SocketModeApp(App app) throws IOException {
+        this(System.getenv("SLACK_APP_TOKEN"), app);
+    }
+
+
+    public SocketModeApp(String appToken, App app) throws IOException {
+        this(appToken, DEFAULT_ERROR_HANDLER, app);
+    }
+
+    public SocketModeApp(
+            String appToken,
+            Function<ErrorContext, Response> errorHandler,
+            App app
+    ) throws IOException {
+        this(buildSocketModeClientFactory(app, appToken, errorHandler), app);
+    }
+
+    public SocketModeApp(
+            String appToken,
+            App app,
+            Function<ErrorContext, Response> errorHandler
+    ) throws IOException {
+        this(buildSocketModeClientFactory(app, appToken, errorHandler), app);
+    }
+
+    public SocketModeApp(Supplier<SocketModeClient> clientFactory, App app) {
+        this.clientFactory = clientFactory;
+        this.app = app;
+    }
+
+    /**
+     * If you would like to synchronously detect the connection error as an exception when bootstrapping,
+     * use this constructor. The first line can throw an exception
+     * in the case where either the token or network settings are valid.
+     *
+     * <code>
+     * SocketModeClient client = JakartaSocketModeClientFactory.create(appToken);
+     * SocketModeApp socketModeApp = new SocketModeApp(client, app);
+     * </code>
+     */
+    public SocketModeApp(SocketModeClient socketModeClient, App app) {
+        this.client = socketModeClient;
+        this.clientFactory = () -> socketModeClient;
+        this.app = app;
+    }
+
+    // -------------------------------------------
+
+    public void start() throws Exception {
+        run(true);
+    }
+
+    public void startAsync() throws Exception {
+        run(false);
+    }
+
+    public void run(boolean blockCurrentThread) throws Exception {
+        this.app.start();
+        if (this.client == null) {
+            this.client = clientFactory.get();
+        }
+        if (this.isClientStopped()) {
+            this.client.connectToNewEndpoint();
+        } else {
+            this.client.connect();
+        }
+        this.client.setAutoReconnectEnabled(true);
+        this.clientStopped = false;
+        if (blockCurrentThread) {
+            Thread.sleep(Long.MAX_VALUE);
+        }
+    }
+
+    public void stop() throws Exception {
+        if (this.client != null && this.client.verifyConnection()) {
+            this.client.disconnect();
+        }
+        this.clientStopped = true;
+        this.app.stop();
+    }
+
+    public void close() throws Exception {
+        this.stop();
+        this.client = null;
+    }
+
+    // -------------------------------------------
+    // Accessors
+    // -------------------------------------------
+
+    public boolean isClientStopped() {
+        return clientStopped;
+    }
+
+    public SocketModeClient getClient() {
+        return client;
+    }
+
+    public App getApp() {
+        return app;
+    }
+}

bolt-jakarta-socket-mode/src/main/java/com/slack/api/bolt/jakarta_socket_mode/package-info.java

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+/**
+ * Built-in Socket Mode adapter supports.
+ */
+package com.slack.api.bolt.jakarta_socket_mode;

bolt-jakarta-socket-mode/src/main/java/com/slack/api/bolt/jakarta_socket_mode/request/SocketModeRequest.java

@@ -0,0 +1,17 @@
+package com.slack.api.bolt.jakarta_socket_mode.request;
+
+import com.slack.api.bolt.request.Request;
+import com.slack.api.socket_mode.request.SocketModeEnvelope;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+@Builder
+public class SocketModeRequest {
+    private SocketModeEnvelope envelope;
+    private Request<?> boltRequest;
+}