kohlmu-pivotal commented on a change in pull request #7456:
URL: https://github.com/apache/geode/pull/7456#discussion_r833677841
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File path:
geode-core/src/main/java/org/apache/geode/internal/cache/control/HeapMemoryMonitor.java
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@@ -144,82 +84,34 @@
private final ResourceAdvisor resourceAdvisor;
private final InternalCache cache;
private final ResourceManagerStats stats;
- private final TenuredHeapConsumptionMonitor tenuredHeapConsumptionMonitor;
- @MutableForTesting
- private static boolean testDisableMemoryUpdates = false;
@MutableForTesting
private static long testBytesUsedForThresholdSet = -1;
- /**
- * Determines if the name of the memory pool MXBean provided matches a list
of known tenured pool
- * names.
- *
- * Package private for testing.
- * checkTenuredHeapConsumption
- *
- * @param memoryPoolMXBean The memory pool MXBean to check.
- * @return True if the pool name matches a known tenured pool name, false
otherwise.
- */
- static boolean isTenured(MemoryPoolMXBean memoryPoolMXBean) {
- if (memoryPoolMXBean.getType() != MemoryType.HEAP) {
- return false;
- }
-
- String name = memoryPoolMXBean.getName();
-
- return name.equals("CMS Old Gen") // Sun Concurrent Mark Sweep GC
- || name.equals("PS Old Gen") // Sun Parallel GC
- || name.equals("G1 Old Gen") // Sun G1 GC
- || name.equals("Old Space") // BEA JRockit 1.5, 1.6 GC
- || name.equals("Tenured Gen") // Hitachi 1.5 GC
- || name.equals("Java heap") // IBM 1.5, 1.6 GC
- || name.equals("GenPauseless Old Gen") // azul C4/GPGC collector
-
- // Allow an unknown pool name to monitor
- || (HEAP_POOL != null && name.equals(HEAP_POOL));
- }
+ @Immutable
+ private static final ServiceLoader<HeapUsageProvider> heapUsageMonitorLoader
=
+ ServiceLoader.load(HeapUsageProvider.class);
Review comment:
I think a ServiceLoader works perfectly well. Having an SPI can lead to
potentially having multiple on the classpath. A thought could be that one could
introduce the idea of "loadWithIdentifier"... Similarly to how SSL works. There
are multiple implementations on the classpath and one needs to specify which
one to load. I think this could support us rather well, if we want to support
different GC algorithms. Thoughts?
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