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Expose the global direct memory counter. (#8945)

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Motivation:
This counter is very useful in order to monitor Netty without having every ByteBufAllocator in the JVM

Modification:
Expose the value of DIRECT_MEMORY_COUNTER as we are already doing for DIRECT_MEMORY_LIMIT.
We are returning -1 in case that DIRECT_MEMORY_COUNTER is not available.

Result:

Be able to get the amount of direct memory used.
This commit is contained in:
Enrico Olivelli 2019-03-19 08:34:35 +01:00 committed by Norman Maurer
parent e9ce5048df
commit eb1d12c757
1 changed files with 10 additions and 0 deletions
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10
common/src/main/java/io/netty/util/internal/PlatformDependent.java
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@ -288,6 +288,16 @@ public final class PlatformDependent {
return DIRECT_MEMORY_LIMIT; return DIRECT_MEMORY_LIMIT;
} }
/**
* Returns the current memory reserved for direct buffer allocation.
* This method returns -1 in case that a value is not available.
*
* @see #maxDirectMemory()
*/
public static long usedDirectMemory() {
return DIRECT_MEMORY_COUNTER != null ? DIRECT_MEMORY_COUNTER.get() : -1;
}
/** /**
* Returns the temporary directory. * Returns the temporary directory.
*/ */