stream.runtime.setup.handler.SystemPropertiesHandler Maven / Gradle / Ivy
/*
* streams library
*
* Copyright (C) 2011-2014 by Christian Bockermann, Hendrik Blom
*
* streams is a library, API and runtime environment for processing high
* volume data streams. It is composed of three submodules "stream-api",
* "stream-core" and "stream-runtime".
*
* The streams library (and its submodules) is free software: you can
* redistribute it and/or modify it under the terms of the
* GNU Affero General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* The stream.ai library (and its submodules) is distributed in the hope
* that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see http://www.gnu.org/licenses/.
*/
package stream.runtime.setup.handler;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.w3c.dom.Document;
import stream.container.IContainer;
import stream.runtime.DependencyInjection;
import stream.util.Variables;
/**
*
* This handler extracts all properties defined in a document and adds these to
* the process container.
*
*
* @author Christian Bockermann <[email protected]>
*
*/
public class SystemPropertiesHandler implements DocumentHandler {
static Logger log = LoggerFactory.getLogger(SystemPropertiesHandler.class);
/**
* @see stream.runtime.setup.handler.DocumentHandler#handle(stream.runtime.ProcessContainer,
* org.w3c.dom.Document)
*/
@Override
public void handle(IContainer container, Document doc, Variables variables,
DependencyInjection depInj) throws Exception {
// add system properties, e.g defined at command line using the -D flag:
// java -Dproperty-name=property-value
//
addSystemProperties(container, variables);
}
/**
* This method adds all the system properties to the container properties,
* possibly overwriting pre-defined properties.
*
* @param container
*/
private void addSystemProperties(IContainer container, Variables variables) {
for (Object key : System.getProperties().keySet()) {
// log.debug("Adding system property '{}' = {}", key,
// System.getProperty(key.toString()));
variables.set(key.toString(), System.getProperty(key.toString()));
}
}
}