org.apache.zeppelin.interpreter.ConfInterpreter.java Source code

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Here is the source code for org.apache.zeppelin.interpreter.ConfInterpreter.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.zeppelin.interpreter;

import org.apache.commons.lang.exception.ExceptionUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.IOException;
import java.io.StringReader;
import java.util.Properties;

/**
 * Special Interpreter for Interpreter Configuration customization. It is attached to each
 * InterpreterGroup implicitly by Zeppelin.
 */
public class ConfInterpreter extends Interpreter {

    private static Logger LOGGER = LoggerFactory.getLogger(ConfInterpreter.class);

    protected String sessionId;
    protected String interpreterGroupId;
    protected InterpreterSetting interpreterSetting;

    public ConfInterpreter(Properties properties, String sessionId, String interpreterGroupId,
            InterpreterSetting interpreterSetting) {
        super(properties);
        this.sessionId = sessionId;
        this.interpreterGroupId = interpreterGroupId;
        this.interpreterSetting = interpreterSetting;
    }

    @Override
    public void open() throws InterpreterException {

    }

    @Override
    public void close() throws InterpreterException {

    }

    @Override
    public InterpreterResult interpret(String st, InterpreterContext context) throws InterpreterException {

        try {
            Properties finalProperties = new Properties();
            finalProperties.putAll(getProperties());
            Properties newProperties = new Properties();
            newProperties.load(new StringReader(st));
            finalProperties.putAll(newProperties);
            LOGGER.debug("Properties for InterpreterGroup: " + interpreterGroupId + " is " + finalProperties);
            interpreterSetting.setInterpreterGroupProperties(interpreterGroupId, finalProperties);
            return new InterpreterResult(InterpreterResult.Code.SUCCESS);
        } catch (IOException e) {
            LOGGER.error("Fail to update interpreter setting", e);
            return new InterpreterResult(InterpreterResult.Code.ERROR, ExceptionUtils.getStackTrace(e));
        }
    }

    @Override
    public void cancel(InterpreterContext context) throws InterpreterException {

    }

    @Override
    public FormType getFormType() throws InterpreterException {
        return null;
    }

    @Override
    public int getProgress(InterpreterContext context) throws InterpreterException {
        return 0;
    }
}