53 lines
2.0 KiB
Java
53 lines
2.0 KiB
Java
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package it.cavallium.dbengine.netty;
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import io.micrometer.core.instrument.MeterRegistry;
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import io.micrometer.core.instrument.Tag;
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import io.micrometer.core.instrument.binder.MeterBinder;
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import io.netty5.buffer.api.BufferAllocator;
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import io.netty5.buffer.api.pool.BufferAllocatorMetric;
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import io.netty5.buffer.api.pool.BufferAllocatorMetricProvider;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.Map;
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import org.jetbrains.annotations.NotNull;
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public class NettyMetrics implements MeterBinder {
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private final BufferAllocator allocator;
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private final String resourceName;
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private final String allocatorName;
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private final Map<String, String> extraTags;
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public NettyMetrics(BufferAllocator allocator,
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String resourceName,
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String allocatorName,
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Map<String, String> extraTags) {
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this.allocator = allocator;
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this.resourceName = resourceName;
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this.allocatorName = allocatorName;
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this.extraTags = extraTags;
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}
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@Override
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public void bindTo(@NotNull MeterRegistry registry) {
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var direct = allocator.getAllocationType().isDirect();
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var pooling = allocator.isPooling();
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List<Tag> tags = new ArrayList<>();
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tags.add(Tag.of("resource", resourceName));
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tags.add(Tag.of("allocator", allocatorName));
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tags.add(Tag.of("type", direct ? "direct" : "heap"));
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tags.add(Tag.of("pooling-mode", pooling ? "pooled" : "unpooled"));
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extraTags.forEach((key, value) -> tags.add(Tag.of(key, value)));
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if (allocator instanceof BufferAllocatorMetricProvider metricProvider) {
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var metric = metricProvider.metric();
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registry.gauge("netty.chunk.size", tags, metric, BufferAllocatorMetric::chunkSize);
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registry.gauge("netty.num.arenas", tags, metric, BufferAllocatorMetric::numArenas);
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registry.gauge("netty.num.thread.local.caches", tags, metric, BufferAllocatorMetric::numThreadLocalCaches);
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registry.gauge("netty.small.cache.size", tags, metric, BufferAllocatorMetric::smallCacheSize);
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registry.gauge("netty.normal.cache.size", tags, metric, BufferAllocatorMetric::normalCacheSize);
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}
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}
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}
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