kieker.monitoring.sampler.sigar.SigarSamplerFactory Maven / Gradle / Ivy
/***************************************************************************
* Copyright 2013 Kieker Project (http://kieker-monitoring.net)
*
* Licensed 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 kieker.monitoring.sampler.sigar;
import org.hyperic.sigar.Humidor;
import org.hyperic.sigar.Sigar;
import org.hyperic.sigar.SigarProxy;
import kieker.common.logging.Log;
import kieker.common.logging.LogFactory;
import kieker.monitoring.sampler.sigar.samplers.CPUsCombinedPercSampler;
import kieker.monitoring.sampler.sigar.samplers.CPUsDetailedPercSampler;
import kieker.monitoring.sampler.sigar.samplers.MemSwapUsageSampler;
/**
* Provides factory methods for {@link kieker.monitoring.sampler.sigar.samplers.AbstractSigarSampler}s.
*
* @author Andre van Hoorn, Jan Waller
*
* @since 1.3
*/
public enum SigarSamplerFactory implements ISigarSamplerFactory { // Singleton pattern (Effective Java #3)
/** The singleton instance. */
INSTANCE;
/**
* {@link SigarProxy} instance used to retrieve the data to be logged.
*/
private final SigarProxy sigar;
/**
* Used by {@link #getInstance()} to construct the singleton instance.
*/
private SigarSamplerFactory() {
final Log log = LogFactory.getLog(SigarSamplerFactory.class); // access to static logger not possible in constructor
final Sigar mySigar = new Sigar();
if (mySigar.getNativeLibrary() == null) {
log.error("No Sigar native lib in java.library.path. See Sigar log for details (maybe only visible on Debug log-level).");
}
final Humidor humidor = new Humidor(mySigar);
this.sigar = humidor.getSigar();
}
/**
* {@link SigarProxy} instance used by this {@link SigarSamplerFactory}.
*
* @return the sigar
*/
public final SigarProxy getSigar() {
return this.sigar;
}
/**
* {@inheritDoc}
*/
public CPUsCombinedPercSampler createSensorCPUsCombinedPerc() {
return new CPUsCombinedPercSampler(this.sigar);
}
/**
* {@inheritDoc}
*/
public CPUsDetailedPercSampler createSensorCPUsDetailedPerc() {
return new CPUsDetailedPercSampler(this.sigar);
}
/**
* {@inheritDoc}
*/
public MemSwapUsageSampler createSensorMemSwapUsage() {
return new MemSwapUsageSampler(this.sigar);
}
}