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Also use system property #2298 

Signed-off-by: Greg Wilkins <gregw@webtide.com>
This commit is contained in:
Greg Wilkins 2018-03-08 08:46:24 +11:00
parent cf0b6140fe
commit 35be19b818
2 changed files with 23 additions and 13 deletions
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19
jetty-util/src/main/java/org/eclipse/jetty/util/ProcessorUtils.java
View File

@ -19,21 +19,24 @@
package org.eclipse.jetty.util;
/**
* ProcessorUtils return the default value for processor number from {@link Runtime}
* but in a virtual environment you can override it using env var <code>JETTY_AVAILABLE_PROCESSORS</code>
* ProcessorUtils provides access to runtime info about processors, that may be
* overridden by system properties of environment variables. This can be useful
* in virtualised environments where the runtime may miss report the available
* resources.
*/
public class ProcessorUtils
{
private static int AVAILABLE_PROCESSORS = Runtime.getRuntime().availableProcessors();
public static final String AVAILABLE_PROCESSORS = "JETTY_AVAILABLE_PROCESSORS";
private static int __availableProcessors = Runtime.getRuntime().availableProcessors();
static
{
String avlProcEnv = System.getenv( "JETTY_AVAILABLE_PROCESSORS" );
String avlProcEnv = System.getProperty(AVAILABLE_PROCESSORS,System.getenv(AVAILABLE_PROCESSORS));
if (avlProcEnv != null)
{
try
{
AVAILABLE_PROCESSORS = Integer.parseInt( avlProcEnv );
__availableProcessors = Integer.parseInt( avlProcEnv );
}
catch ( NumberFormatException e )
{
@ -43,11 +46,13 @@ public class ProcessorUtils
}
/**
*
* Obtain the number of available processors, from System Property "JETTY_AVAILABLE_PROCESSORS",
* or if not set then environment variable "JETTY_AVAILABLE_PROCESSORS" or if not set then
* {@link Runtime#availableProcessors()}.
* @return the number of processors
*/
public static int availableProcessors()
{
return AVAILABLE_PROCESSORS;
return __availableProcessors;
}
}

15
jetty-util/src/test/java/org/eclipse/jetty/util/ProcessorUtilsTest.java
View File

@ -19,6 +19,7 @@
package org.eclipse.jetty.util;
import org.junit.Assert;
import org.junit.BeforeClass;
import org.junit.Test;
/**
@ -26,11 +27,15 @@ import org.junit.Test;
*/
public class ProcessorUtilsTest
{
@Test
public void get_default_value(){
Assert.assertEquals(Runtime.getRuntime().availableProcessors(), ProcessorUtils.availableProcessors());
@BeforeClass
public static void beforeClass()
{
System.setProperty("JETTY_AVAILABLE_PROCESSORS","42");
}
@Test
public void getPropertyValue()
{
Assert.assertEquals(42, ProcessorUtils.availableProcessors());
}
}