MCP Console Automation Server

import { spawn, ChildProcess } from 'child_process'; import { BaseProtocol } from '../core/BaseProtocol.js'; import { ConsoleSession, SessionOptions, ConsoleType, ConsoleOutput, } from '../types/index.js'; import { ProtocolCapabilities, SessionState, ErrorContext, ProtocolHealthStatus, ErrorRecoveryResult, ResourceUsage, } from '../core/IProtocol.js'; // Java Protocol connection options interface JavaConnectionOptions extends SessionOptions { javaHome?: string; classPath?: string; mainClass?: string; jarFile?: string; vmOptions?: string[]; jvmFlags?: string[]; heapSize?: string; systemProperties?: Record<string, string>; workingDirectory?: string; enableJMX?: boolean; jmxPort?: number; debugPort?: number; enableDebug?: boolean; springProfile?: string; springConfigLocation?: string; } /** * Java Protocol Implementation * * Provides Java application console access through java command * Supports JAR files, main classes, JVM options, debugging, and Spring Boot applications */ export class JavaProtocol extends BaseProtocol { public readonly type: ConsoleType = 'java'; public readonly capabilities: ProtocolCapabilities; private javaProcesses = new Map<string, ChildProcess>(); // Compatibility property for old ProtocolFactory interface public get healthStatus(): ProtocolHealthStatus { return { isHealthy: this.isInitialized, lastChecked: new Date(), errors: [], warnings: [], metrics: { activeSessions: this.sessions.size, totalSessions: this.sessions.size, averageLatency: 0, successRate: 100, uptime: 0, }, dependencies: {}, }; } constructor() { super('java'); this.capabilities = { supportsStreaming: true, supportsFileTransfer: false, supportsX11Forwarding: false, supportsPortForwarding: false, supportsAuthentication: false, supportsEncryption: false, supportsCompression: false, supportsMultiplexing: false, supportsKeepAlive: true, supportsReconnection: true, supportsBinaryData: false, supportsCustomEnvironment: true, supportsWorkingDirectory: true, supportsSignals: true, supportsResizing: false, supportsPTY: false, maxConcurrentSessions: 25, defaultTimeout: 30000, supportedEncodings: ['utf-8'], supportedAuthMethods: [], platformSupport: { windows: true, linux: true, macos: true, freebsd: true, }, }; } async initialize(): Promise<void> { if (this.isInitialized) return; try { // Check if Java is available await this.checkJavaAvailability(); this.isInitialized = true; this.logger.info('Java protocol initialized with production features'); } catch (error: any) { this.logger.error('Failed to initialize Java protocol', error); throw error; } } async createSession(options: SessionOptions): Promise<ConsoleSession> { const sessionId = `java-${Date.now()}-${Math.random().toString(36).substring(2, 11)}`; return await this.createSessionWithTypeDetection(sessionId, options); } async dispose(): Promise<void> { await this.cleanup(); } async executeCommand( sessionId: string, command: string, args?: string[] ): Promise<void> { const fullCommand = args && args.length > 0 ? `${command} ${args.join(' ')}` : command; await this.sendInput(sessionId, fullCommand + '\n'); } async sendInput(sessionId: string, input: string): Promise<void> { const javaProcess = this.javaProcesses.get(sessionId); const session = this.sessions.get(sessionId); if (!javaProcess || !javaProcess.stdin || !session) { throw new Error(`No active Java session: ${sessionId}`); } javaProcess.stdin.write(input); session.lastActivity = new Date(); this.emit('input-sent', { sessionId, input, timestamp: new Date(), }); this.logger.debug( `Sent input to Java session ${sessionId}: ${input.substring(0, 100)}` ); } async closeSession(sessionId: string): Promise<void> { try { const javaProcess = this.javaProcesses.get(sessionId); if (javaProcess) { // Try graceful shutdown first javaProcess.kill('SIGTERM'); // Force kill after timeout setTimeout(() => { if (javaProcess && !javaProcess.killed) { javaProcess.kill('SIGKILL'); } }, 5000); this.javaProcesses.delete(sessionId); } // Clean up base protocol session this.sessions.delete(sessionId); this.logger.info(`Java session ${sessionId} closed`); this.emit('session-closed', sessionId); } catch (error) { this.logger.error(`Error closing Java session ${sessionId}:`, error); throw error; } } async doCreateSession( sessionId: string, options: SessionOptions, sessionState: SessionState ): Promise<ConsoleSession> { if (!this.isInitialized) { await this.initialize(); } const javaOptions = options as JavaConnectionOptions; // Build Java command const javaCommand = this.buildJavaCommand(javaOptions); // Spawn Java process const javaProcess = spawn(javaCommand[0], javaCommand.slice(1), { stdio: ['pipe', 'pipe', 'pipe'], cwd: javaOptions.workingDirectory || options.cwd || process.cwd(), env: { ...process.env, ...this.buildEnvironment(javaOptions), ...options.env, }, }); // Set up output handling javaProcess.stdout?.on('data', (data) => { const output: ConsoleOutput = { sessionId, type: 'stdout', data: data.toString(), timestamp: new Date(), }; this.addToOutputBuffer(sessionId, output); }); javaProcess.stderr?.on('data', (data) => { const output: ConsoleOutput = { sessionId, type: 'stderr', data: data.toString(), timestamp: new Date(), }; this.addToOutputBuffer(sessionId, output); }); javaProcess.on('error', (error) => { this.logger.error(`Java process error for session ${sessionId}:`, error); this.emit('session-error', { sessionId, error }); }); javaProcess.on('close', (code) => { this.logger.info( `Java process closed for session ${sessionId} with code ${code}` ); this.markSessionComplete(sessionId, code || 0); }); // Store the process this.javaProcesses.set(sessionId, javaProcess); // Create session object const session: ConsoleSession = { id: sessionId, command: javaCommand[0], args: javaCommand.slice(1), cwd: javaOptions.workingDirectory || options.cwd || process.cwd(), env: { ...process.env, ...this.buildEnvironment(javaOptions), ...options.env, }, createdAt: new Date(), lastActivity: new Date(), status: 'running', type: this.type, streaming: options.streaming, executionState: 'idle', activeCommands: new Map(), pid: javaProcess.pid, }; this.sessions.set(sessionId, session); this.logger.info( `Java session ${sessionId} created for ${javaOptions.jarFile || javaOptions.mainClass || 'Java application'}` ); this.emit('session-created', { sessionId, type: 'java', session }); return session; } // Override getOutput to satisfy old ProtocolFactory interface (returns string) async getOutput(sessionId: string, since?: Date): Promise<any> { const outputs = await super.getOutput(sessionId, since); return outputs.map((output) => output.data).join(''); } // Missing IProtocol methods for compatibility getAllSessions(): ConsoleSession[] { return Array.from(this.sessions.values()); } getActiveSessions(): ConsoleSession[] { return Array.from(this.sessions.values()).filter( (session) => session.status === 'running' ); } getSessionCount(): number { return this.sessions.size; } async getSessionState(sessionId: string): Promise<SessionState> { const session = this.sessions.get(sessionId); if (!session) { throw new Error(`Session ${sessionId} not found`); } return { sessionId, status: session.status, isOneShot: false, // Java applications are persistent by default isPersistent: true, createdAt: session.createdAt, lastActivity: session.lastActivity, pid: session.pid, metadata: {}, }; } async handleError( error: Error, context: ErrorContext ): Promise<ErrorRecoveryResult> { this.logger.error( `Error in Java session ${context.sessionId}: ${error.message}` ); return { recovered: false, strategy: 'none', attempts: 0, duration: 0, error: error.message, }; } async recoverSession(sessionId: string): Promise<boolean> { const javaProcess = this.javaProcesses.get(sessionId); return (javaProcess && !javaProcess.killed) || false; } getResourceUsage(): ResourceUsage { const memUsage = process.memoryUsage(); const cpuUsage = process.cpuUsage(); return { memory: { used: memUsage.heapUsed, available: memUsage.heapTotal, peak: memUsage.heapTotal, }, cpu: { usage: cpuUsage.user + cpuUsage.system, load: [0, 0, 0], }, network: { bytesIn: 0, bytesOut: 0, connectionsActive: this.javaProcesses.size, }, storage: { bytesRead: 0, bytesWritten: 0, }, sessions: { active: this.sessions.size, total: this.sessions.size, peak: this.sessions.size, }, }; } async getHealthStatus(): Promise<ProtocolHealthStatus> { const baseStatus = await super.getHealthStatus(); try { await this.checkJavaAvailability(); return { ...baseStatus, dependencies: { java: { available: true }, }, }; } catch (error) { return { ...baseStatus, isHealthy: false, errors: [...baseStatus.errors, `Java not available: ${error}`], dependencies: { java: { available: false }, }, }; } } private async checkJavaAvailability(): Promise<void> { return new Promise((resolve, reject) => { const testProcess = spawn('java', ['-version'], { stdio: 'pipe' }); testProcess.on('close', (code) => { if (code === 0) { resolve(); } else { reject(new Error('Java runtime not found. Please install Java.')); } }); testProcess.on('error', () => { reject(new Error('Java runtime not found. Please install Java.')); }); }); } private buildJavaCommand(options: JavaConnectionOptions): string[] { const command = []; // Java executable const javaHome = options.javaHome || process.env.JAVA_HOME; if (javaHome) { command.push(`${javaHome}/bin/java`); } else { command.push('java'); } // JVM flags and options if (options.jvmFlags) { command.push(...options.jvmFlags); } if (options.vmOptions) { command.push(...options.vmOptions); } // Heap size if (options.heapSize) { command.push(`-Xmx${options.heapSize}`); } // System properties if (options.systemProperties) { for (const [key, value] of Object.entries(options.systemProperties)) { command.push(`-D${key}=${value}`); } } // Spring Boot properties if (options.springProfile) { command.push(`-Dspring.profiles.active=${options.springProfile}`); } if (options.springConfigLocation) { command.push(`-Dspring.config.location=${options.springConfigLocation}`); } // Debug options if (options.enableDebug && options.debugPort) { command.push( `-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=${options.debugPort}` ); } // JMX options if (options.enableJMX && options.jmxPort) { command.push(`-Dcom.sun.management.jmxremote`); command.push(`-Dcom.sun.management.jmxremote.port=${options.jmxPort}`); command.push(`-Dcom.sun.management.jmxremote.authenticate=false`); command.push(`-Dcom.sun.management.jmxremote.ssl=false`); } // Classpath if (options.classPath) { command.push('-cp', options.classPath); } // JAR file or main class if (options.jarFile) { command.push('-jar', options.jarFile); } else if (options.mainClass) { command.push(options.mainClass); } else { // Default to version if no jar or main class specified command.push('-version'); } // Application arguments if (options.args) { command.push(...options.args); } return command; } private buildEnvironment( options: JavaConnectionOptions ): Record<string, string> { const env: Record<string, string> = {}; if (options.javaHome) { env.JAVA_HOME = options.javaHome; } if (options.classPath) { env.CLASSPATH = options.classPath; } return env; } async cleanup(): Promise<void> { this.logger.info('Cleaning up Java protocol'); // Close all Java processes for (const [sessionId, process] of Array.from(this.javaProcesses)) { try { process.kill(); } catch (error) { this.logger.error( `Error killing Java process for session ${sessionId}:`, error ); } } // Clear all data this.javaProcesses.clear(); // Call parent cleanup await super.cleanup(); } } export default JavaProtocol;