com.zenoss.zenpacks.zenjmx.call.CallFactory.java Source code

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Here is the source code for com.zenoss.zenpacks.zenjmx.call.CallFactory.java

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/*****************************************************************************
 * 
 * Copyright (C) Zenoss, Inc. 2008, all rights reserved.
 * 
 * This content is made available according to terms specified in
 * License.zenoss under the directory where your Zenoss product is installed.
 * 
 ****************************************************************************/

package com.zenoss.zenpacks.zenjmx.call;

import java.util.List;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.zenoss.zenpacks.zenjmx.ConfigAdapter;

/**
 * <p> Factory to produce JmxCalls based on the JMX QueryType value
 * and the rest of the configuration. </p>
 *
 * <p>$Author: chris $</p>
 *
 * @author Christopher Blunck
 * @version $Revision: 1.6 $
 */
public class CallFactory {

    // configuration items (keys) in the config returned from the server
    public static final String DATA_POINT = "dps";
    public static final String DEVICE_ID = "device";
    public static final String DATASOURCE_ID = "datasourceId";

    // logger
    private static final Log _logger = LogFactory.getLog(CallFactory.class);

    /**
     * Private constructor enforces non-instantiability
     */
    private CallFactory() {
    }

    /**
     * Creates a JmxCall from a configuration read from the server
     * @param config the name-value parameters from the server
     * @throws ConfigurationException if the configuration provided does not
     *         contain sufficient information to create a call.
     */
    public static JmxCall createCall(ConfigAdapter config) throws ConfigurationException {

        _logger.debug("config: " + config);

        List<String> dataPoints = config.getDataPoints();
        if (dataPoints.isEmpty()) {
            _logger.warn("no data points defined");
            throw new ConfigurationException("Datasource " + config.getDatasourceId() + "No datapoints defined;"
                    + " will not run collections");
        }

        // if the attributeName is blank the configuration represents an operation
        String attributeName = config.getAttributeName();
        JmxCall call = null;
        if (attributeName.trim().length() == 0) {
            _logger.debug("creating an operation call");
            call = OperationCall.fromValue(config);
        } else {
            _logger.debug("creating an attribute call");
            call = AttributeCall.fromValue(config);
        }
        return call;
    }
}