sqlflow integrate with zeppelin (SQLFlowInterpreter.java)

src/main/java/org/apache/zeppelin/sqlflow/SQLFlowInterpreter.java

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+package org.apache.zeppelin.sqlflow;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Properties;
+
+import org.apache.zeppelin.interpreter.Interpreter;
+import org.apache.zeppelin.interpreter.InterpreterContext;
+import org.apache.zeppelin.interpreter.InterpreterException;
+import org.apache.zeppelin.interpreter.InterpreterResult;
+import org.apache.zeppelin.sqlflow.client.MessageHandlerZeppelin;
+import org.sqlflow.client.SQLFlow;
+import org.apache.zeppelin.sqlflow.client.utils.EnvironmentSpecificSQLFlowClient;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.apache.commons.lang3.StringUtils;
+
+public class SQLFlowInterpreter extends Interpreter {
+	// Print Log
+	private static final Logger LOGGER = LoggerFactory
+			.getLogger(SQLFlowInterpreter.class);
+
+	private Map<String, String> parameters = new HashMap<String, String>();
+
+	public static final String SQLFLOW_SERVERADDR = "sqlflow.serverAddr";
+	public static final String MYSQL_USERNAME = "mysql.username";
+	public static final String MYSQL_PASSWORD = "mysql.password";
+	public static final String MYSQL_SERVERADDR = "mysql.serverAddr";
+	public static final String MYSQL_DATABASENAME = "mysql.databaseName";
+
+	public SQLFlowInterpreter(Properties properties) {
+		super(properties);
+	}
+
+	@Override
+	public void open() throws InterpreterException {
+		// get the configured parameters from the front page
+		String sqlflowServerAddr = getProperty(SQLFLOW_SERVERADDR);
+		String mysqlUserName = getProperty(MYSQL_USERNAME);
+		String mysqlPassword = getProperty(MYSQL_PASSWORD);
+		String mysqlAddr = getProperty(MYSQL_SERVERADDR);
+		String mysqlDatabaseName = getProperty(MYSQL_DATABASENAME);
+
+		parameters.put(SQLFLOW_SERVERADDR, sqlflowServerAddr);
+		parameters.put(MYSQL_USERNAME, mysqlUserName);
+		parameters.put(MYSQL_PASSWORD, mysqlPassword);
+		parameters.put(MYSQL_SERVERADDR, mysqlAddr);
+		parameters.put(MYSQL_DATABASENAME, mysqlDatabaseName);
+	}
+
+	@Override
+	public void cancel(InterpreterContext arg0) throws InterpreterException {
+	}
+
+	@Override
+	public void close() throws InterpreterException {
+	}
+
+	@Override
+	public FormType getFormType() throws InterpreterException {
+		return FormType.SIMPLE;
+	}
+
+	@Override
+	public int getProgress(InterpreterContext arg0) throws InterpreterException {
+		return 20;
+	}
+
+	@Override
+	public InterpreterResult interpret(String query, InterpreterContext context)
+			throws InterpreterException {
+		if (StringUtils.isBlank(query)) {
+			return new InterpreterResult(InterpreterResult.Code.SUCCESS);
+		}
+
+		// Create user
+		SQLFlow client = EnvironmentSpecificSQLFlowClient.getClient(
+				new MessageHandlerZeppelin(context), parameters);
+		try {
+			// Run custom sqlflow code
+			client.run(query);
+			// Release user
+			client.release();
+
+			return new InterpreterResult(InterpreterResult.Code.SUCCESS);
+		} catch (InterruptedException e) {
+			LOGGER.error("client error", e);
+			return new InterpreterResult(InterpreterResult.Code.ERROR);
+		}
+	}
+}