org.hyperic.sigar.jmx.SigarCpu Maven / Gradle / Ivy
/*
* Copyright (c) 2007, 2009 Hyperic, Inc.
*
* 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 org.hyperic.sigar.jmx;
import javax.management.Attribute;
import javax.management.AttributeNotFoundException;
import javax.management.MBeanAttributeInfo;
import javax.management.MBeanConstructorInfo;
import javax.management.MBeanInfo;
import javax.management.MBeanParameterInfo;
import javax.management.ReflectionException;
import org.hyperic.sigar.Sigar;
import org.hyperic.sigar.SigarException;
/**
* Sigar JMX MBean implementation for the Cpu information
* package. Provides an OpenMBean conform implementation.
*
* @author Bjoern Martin
* @since 1.5
*/
public class SigarCpu extends AbstractMBean {
private static final String MBEAN_TYPE = "CpuList";
private static final MBeanInfo MBEAN_INFO;
private static final MBeanAttributeInfo MBEAN_ATTR_CPUINDEX;
private static final MBeanAttributeInfo MBEAN_ATTR_IDLE;
private static final MBeanAttributeInfo MBEAN_ATTR_NICE;
private static final MBeanAttributeInfo MBEAN_ATTR_SYS;
private static final MBeanAttributeInfo MBEAN_ATTR_TOTAL;
private static final MBeanAttributeInfo MBEAN_ATTR_USER;
private static final MBeanAttributeInfo MBEAN_ATTR_WAIT;
private static final MBeanConstructorInfo MBEAN_CONSTR_CPUINDEX;
private static final MBeanConstructorInfo MBEAN_CONSTR_CPUINDEX_SIGAR;
private static MBeanParameterInfo MBEAN_PARAM_CPUINDEX;
private static MBeanParameterInfo MBEAN_PARAM_SIGAR;
static {
MBEAN_ATTR_CPUINDEX = new MBeanAttributeInfo("CpuIndex", "int",
"The index of the CPU, typically starting at 0", true, false,
false);
MBEAN_ATTR_IDLE = new MBeanAttributeInfo("Idle", "long",
"The idle time of the CPU, in [ms]", true, false, false);
MBEAN_ATTR_NICE = new MBeanAttributeInfo("Nice", "long",
"The time of the CPU spent on nice priority, in [ms]", true,
false, false);
MBEAN_ATTR_SYS = new MBeanAttributeInfo("Sys", "long",
"The time of the CPU used by the system, in [ms]", true, false,
false);
MBEAN_ATTR_TOTAL = new MBeanAttributeInfo("Total", "long",
"The total time of the CPU, in [ms]", true, false, false);
MBEAN_ATTR_USER = new MBeanAttributeInfo("User", "long",
"The time of the CPU used by user processes, in [ms]", true,
false, false);
MBEAN_ATTR_WAIT = new MBeanAttributeInfo("Wait", "long",
"The time the CPU had to wait for data to be loaded, in [ms]",
true, false, false);
MBEAN_PARAM_CPUINDEX = new MBeanParameterInfo("cpuIndex", "int",
"The index of the CPU to read data for. Must be >= 0 "
+ "and not exceed the CPU count of the system");
MBEAN_PARAM_SIGAR = new MBeanParameterInfo("sigar", Sigar.class
.getName(), "The Sigar instance to use to fetch data from");
MBEAN_CONSTR_CPUINDEX = new MBeanConstructorInfo(SigarCpu.class
.getName(),
"Creates a new instance for the CPU index specified, "
+ "using a new Sigar instance to fetch the data. "
+ "Fails if the CPU index is out of range.",
new MBeanParameterInfo[] { MBEAN_PARAM_CPUINDEX });
MBEAN_CONSTR_CPUINDEX_SIGAR = new MBeanConstructorInfo(
SigarCpu.class.getName(),
"Creates a new instance for the CPU index specified, "
+ "using the Sigar instance specified to fetch the data. "
+ "Fails if the CPU index is out of range.",
new MBeanParameterInfo[] { MBEAN_PARAM_SIGAR,
MBEAN_PARAM_CPUINDEX });
MBEAN_INFO = new MBeanInfo(
SigarCpu.class.getName(),
"Sigar CPU MBean. Provides raw timing data for a single "
+ "CPU. The data is cached for 500ms, meaning each request "
+ "(and as a result each block request to all parameters) "
+ "within half a second is satisfied from the same dataset.",
new MBeanAttributeInfo[] { MBEAN_ATTR_CPUINDEX,
MBEAN_ATTR_IDLE, MBEAN_ATTR_NICE, MBEAN_ATTR_SYS,
MBEAN_ATTR_TOTAL, MBEAN_ATTR_USER, MBEAN_ATTR_WAIT },
new MBeanConstructorInfo[] { MBEAN_CONSTR_CPUINDEX,
MBEAN_CONSTR_CPUINDEX_SIGAR }, null, null);
}
/**
* Index of the CPU processed by the instance.
*/
private final int cpuIndex;
/**
* Object name this instance will give itself when being registered to an
* MBeanServer.
*/
private final String objectName;
/**
* Creates a new instance for the CPU index specified, using a new Sigar
* instance to fetch the data. Fails if the CPU index is out of range.
*
* @param cpuIndex
* The index of the CPU to read data for. Must be >= 0
* and not exceed the CPU count of the system.
*
* @throws IllegalArgumentException
* If the CPU index is out of range or an unexpected Sigar error
* occurs.
*/
public SigarCpu(int cpuIndex) throws IllegalArgumentException {
this(new Sigar(), cpuIndex);
}
/**
* Creates a new instance for the CPU index specified, using the Sigar
* instance specified to fetch the data. Fails if the CPU index is out of
* range.
*
* @param sigar
* The Sigar instance to use to fetch data from
* @param cpuIndex
* The index of the CPU to read data for. Must be
* >= 0 and not exceed the CPU count of the
* system.
*
* @throws IllegalArgumentException
* If the CPU index is out of range or an unexpected Sigar error
* occurs
*/
public SigarCpu(Sigar sigar, int cpuIndex) throws IllegalArgumentException {
super(sigar, CACHED_500MS);
// check index
if (cpuIndex < 0)
throw new IllegalArgumentException(
"CPU index has to be non-negative: " + cpuIndex);
try {
int cpuCount;
if ((cpuCount = sigar.getCpuList().length) < cpuIndex)
throw new IllegalArgumentException(
"CPU index out of range (found " + cpuCount
+ " CPU(s)): " + cpuIndex);
} catch (SigarException e) {
throw unexpectedError(MBEAN_TYPE, e);
}
// all fine
this.cpuIndex = cpuIndex;
this.objectName = SigarInvokerJMX.DOMAIN_NAME + ":" + MBEAN_ATTR_TYPE
+ "=Cpu,"
+ MBEAN_ATTR_CPUINDEX.getName().substring(0, 1).toLowerCase()
+ MBEAN_ATTR_CPUINDEX.getName().substring(1) + "=" + cpuIndex;
}
/**
* Object name this instance will give itself when being registered to an
* MBeanServer.
*/
public String getObjectName() {
return this.objectName;
}
/**
* @return The index of the CPU, typically starting at 0
*/
public int getCpuIndex() {
return this.cpuIndex;
}
/**
* @return The idle time of the CPU, in [ms]
*/
public long getIdle() {
try {
return sigar.getCpuList()[this.cpuIndex].getIdle();
} catch (SigarException e) {
throw unexpectedError(MBEAN_TYPE, e);
}
}
/**
* @return The time of the CPU spent on nice priority, in [ms]
*/
public long getNice() {
try {
return sigar.getCpuList()[this.cpuIndex].getNice();
} catch (SigarException e) {
throw unexpectedError(MBEAN_TYPE, e);
}
}
/**
* @return The time of the CPU used by the system, in [ms]
*/
public long getSys() {
try {
return sigar.getCpuList()[this.cpuIndex].getSys();
} catch (SigarException e) {
throw unexpectedError(MBEAN_TYPE, e);
}
}
/**
* @return The total time of the CPU, in [ms]
*/
public long getTotal() {
try {
return sigar.getCpuList()[this.cpuIndex].getTotal();
} catch (SigarException e) {
throw unexpectedError(MBEAN_TYPE, e);
}
}
/**
* @return The time of the CPU used by user processes, in [ms]
*/
public long getUser() {
try {
return sigar.getCpuList()[this.cpuIndex].getUser();
} catch (SigarException e) {
throw unexpectedError(MBEAN_TYPE, e);
}
}
/**
* @return The time the CPU had to wait for data to be loaded, in [ms]
*/
public long getWait() {
try {
return sigar.getCpuList()[this.cpuIndex].getWait();
} catch (SigarException e) {
throw unexpectedError(MBEAN_TYPE, e);
}
}
// -------
// Implementation of the DynamicMBean interface
// -------
/*
* (non-Javadoc)
*
* @see DynamicMBean#getAttribute(String)
*/
public Object getAttribute(String attr) throws AttributeNotFoundException {
if (MBEAN_ATTR_CPUINDEX.getName().equals(attr)) {
return new Integer(getCpuIndex());
} else if (MBEAN_ATTR_IDLE.getName().equals(attr)) {
return new Long(getIdle());
} else if (MBEAN_ATTR_NICE.getName().equals(attr)) {
return new Long(getNice());
} else if (MBEAN_ATTR_SYS.getName().equals(attr)) {
return new Long(getSys());
} else if (MBEAN_ATTR_TOTAL.getName().equals(attr)) {
return new Long(getTotal());
} else if (MBEAN_ATTR_USER.getName().equals(attr)) {
return new Long(getUser());
} else if (MBEAN_ATTR_WAIT.getName().equals(attr)) {
return new Long(getWait());
} else {
throw new AttributeNotFoundException(attr);
}
}
/*
* (non-Javadoc)
*
* @see DynamicMBean#setAttribute(Attribute)
*/
public void setAttribute(Attribute attr) throws AttributeNotFoundException {
throw new AttributeNotFoundException(attr.getName());
}
/*
* (non-Javadoc)
*
* @see DynamicMBean#invoke(String, Object[], String[])
*/
public Object invoke(String actionName, Object[] params, String[] signature)
throws ReflectionException {
throw new ReflectionException(new NoSuchMethodException(actionName),
actionName);
}
/*
* (non-Javadoc)
*
* @see DynamicMBean#getMBeanInfo()
*/
public MBeanInfo getMBeanInfo() {
return MBEAN_INFO;
}
}
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