ML Environment Management

/**
 * Stores necessary Flink execution context with unique ID for job sharing
 */
public class MLEnvironment {
    /**
     * Default constructor creating empty environment
     */
    public MLEnvironment();
    
    /**
     * Constructor for batch-only environment
     * @param batchEnv Batch execution environment
     * @param batchTableEnv Batch table environment
     */
    public MLEnvironment(ExecutionEnvironment batchEnv, BatchTableEnvironment batchTableEnv);
    
    /**
     * Constructor for stream-only environment
     * @param streamEnv Stream execution environment
     * @param streamTableEnv Stream table environment
     */
    public MLEnvironment(StreamExecutionEnvironment streamEnv, StreamTableEnvironment streamTableEnv);
    
    /**
     * Constructor for dual batch/stream environment
     * @param batchEnv Batch execution environment
     * @param batchTableEnv Batch table environment
     * @param streamEnv Stream execution environment
     * @param streamTableEnv Stream table environment
     */
    public MLEnvironment(ExecutionEnvironment batchEnv, BatchTableEnvironment batchTableEnv,
                        StreamExecutionEnvironment streamEnv, StreamTableEnvironment streamTableEnv);
    
    /**
     * Get batch execution environment
     * @return ExecutionEnvironment for batch processing
     */
    public ExecutionEnvironment getExecutionEnvironment();
    
    /**
     * Get stream execution environment
     * @return StreamExecutionEnvironment for stream processing
     */
    public StreamExecutionEnvironment getStreamExecutionEnvironment();
    
    /**
     * Get batch table environment
     * @return BatchTableEnvironment for batch table operations
     */
    public BatchTableEnvironment getBatchTableEnvironment();
    
    /**
     * Get stream table environment
     * @return StreamTableEnvironment for stream table operations
     */
    public StreamTableEnvironment getStreamTableEnvironment();
}

import org.apache.flink.ml.common.MLEnvironment;
import org.apache.flink.api.java.ExecutionEnvironment;
import org.apache.flink.table.api.bridge.java.BatchTableEnvironment;

// Create batch-only ML environment
ExecutionEnvironment batchEnv = ExecutionEnvironment.getExecutionEnvironment();
BatchTableEnvironment batchTableEnv = BatchTableEnvironment.create(batchEnv);
MLEnvironment mlEnv = new MLEnvironment(batchEnv, batchTableEnv);

// Use the environment
ExecutionEnvironment env = mlEnv.getExecutionEnvironment();
BatchTableEnvironment tableEnv = mlEnv.getBatchTableEnvironment();

/**
 * Factory for creating and managing MLEnvironment instances
 */
public class MLEnvironmentFactory {
    /** Default environment ID constant */
    public static final Long DEFAULT_ML_ENVIRONMENT_ID = 0L;
    
    /**
     * Get MLEnvironment by ID
     * @param mlEnvId Environment ID
     * @return MLEnvironment instance or null if not found
     */
    public static MLEnvironment get(Long mlEnvId);
    
    /**
     * Get default MLEnvironment
     * @return Default MLEnvironment instance
     */
    public static MLEnvironment getDefault();
    
    /**
     * Create new unique MLEnvironment ID
     * @return New unique environment ID
     */
    public static Long getNewMLEnvironmentId();
    
    /**
     * Register MLEnvironment instance
     * @param env MLEnvironment to register
     * @return Assigned environment ID
     */
    public static Long registerMLEnvironment(MLEnvironment env);
    
    /**
     * Remove MLEnvironment by ID
     * @param mlEnvId Environment ID to remove
     * @return Removed MLEnvironment instance or null
     */
    public static MLEnvironment remove(Long mlEnvId);
}

import org.apache.flink.ml.common.MLEnvironmentFactory;
import org.apache.flink.ml.common.MLEnvironment;

// Get default environment
MLEnvironment defaultEnv = MLEnvironmentFactory.getDefault();

// Register custom environment
MLEnvironment customEnv = new MLEnvironment(batchEnv, batchTableEnv);
Long envId = MLEnvironmentFactory.registerMLEnvironment(customEnv);

// Retrieve registered environment
MLEnvironment retrievedEnv = MLEnvironmentFactory.get(envId);

// Clean up
MLEnvironmentFactory.remove(envId);

/**
 * Parameter interface for ML environment ID
 */
public interface HasMLEnvironmentId<T> extends WithParams<T> {
    /** Parameter info for ML environment ID */
    ParamInfo<Long> ML_ENVIRONMENT_ID = ParamInfoFactory
        .createParamInfo("mlEnvironmentId", Long.class)
        .setDescription("ML environment ID")
        .setHasDefaultValue(MLEnvironmentFactory.DEFAULT_ML_ENVIRONMENT_ID)
        .build();
    
    /**
     * Get ML environment ID
     * @return Environment ID
     */
    default Long getMLEnvironmentId() {
        return get(ML_ENVIRONMENT_ID);
    }
    
    /**
     * Set ML environment ID
     * @param value Environment ID
     * @return This instance for method chaining
     */
    default T setMLEnvironmentId(Long value) {
        return set(ML_ENVIRONMENT_ID, value);
    }
}

// Any class implementing HasMLEnvironmentId can manage environment ID
public class MyMLComponent implements HasMLEnvironmentId<MyMLComponent> {
    private Params params = new Params();
    
    @Override
    public Params getParams() { return params; }
    
    public void process() {
        Long envId = getMLEnvironmentId();
        MLEnvironment env = MLEnvironmentFactory.get(envId);
        // Use environment for processing
    }
}

// Usage
MyMLComponent component = new MyMLComponent()
    .setMLEnvironmentId(customEnvId);