89 lines
3.3 KiB
Java
89 lines
3.3 KiB
Java
package it.cavallium.dbengine.netty;
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import io.netty.buffer.api.BufferAllocatorMetric;
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import io.netty.buffer.PoolArenaMetric;
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import io.netty.buffer.PooledByteBufAllocator;
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import io.netty.buffer.PooledByteBufAllocatorMetric;
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import io.netty.buffer.UnpooledByteBufAllocator;
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import java.lang.management.ManagementFactory;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.Map.Entry;
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import java.util.concurrent.atomic.AtomicInteger;
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import java.util.stream.Stream;
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import javax.management.InstanceAlreadyExistsException;
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import javax.management.MBeanRegistrationException;
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import javax.management.MBeanServer;
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import javax.management.MalformedObjectNameException;
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import javax.management.NotCompliantMBeanException;
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import javax.management.ObjectName;
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import javax.management.StandardMBean;
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public class JMXNettyMonitoringManager {
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private final AtomicInteger nextArenaId = new AtomicInteger();
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private static JMXNettyMonitoringManager instance;
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private final MBeanServer platformMBeanServer;
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private JMXNettyMonitoringManager() {
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this.platformMBeanServer = ManagementFactory.getPlatformMBeanServer();
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}
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public static void initialize() {
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getInstance();
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}
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public synchronized static JMXNettyMonitoringManager getInstance() {
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if (instance == null) {
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instance = new JMXNettyMonitoringManager();
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instance.initializeInternal();
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}
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return instance;
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}
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private void initializeInternal() {
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Map<String, ByteBufAllocatorMetric> allocators = new HashMap<>();
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allocators.put("unpooled", UnpooledByteBufAllocator.DEFAULT.metric());
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allocators.put("pooled", PooledByteBufAllocator.DEFAULT.metric());
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for (var entry : allocators.entrySet()) {
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register(entry.getKey(), entry.getValue());
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}
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}
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public void register(String name, ByteBufAllocatorMetric metric) {
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try {
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name = name.replaceAll("[^\\p{IsAlphabetic}\\p{IsDigit}_]", "_");
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String type;
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StandardMBean mbean;
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if (metric instanceof PooledByteBufAllocatorMetric) {
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var pooledMetric = (PooledByteBufAllocatorMetric) metric;
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for (var arenaEntry : (Iterable<Entry<String, PoolArenaMetric>>) Stream.concat(
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pooledMetric.directArenas().stream().map(arena -> Map.entry("direct", arena)),
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pooledMetric.heapArenas().stream().map(arena -> Map.entry("heap", arena))
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)::iterator) {
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var arenaType = arenaEntry.getKey();
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var arenaMetric = arenaEntry.getValue();
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var jmx = new JMXPoolArenaNettyMonitoring(arenaMetric);
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mbean = new StandardMBean(jmx, JMXPoolArenaNettyMonitoringMBean.class);
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ObjectName botObjectName = new ObjectName("io.netty.stats:name=PoolArena,type=" + arenaType + ",arenaId=" + nextArenaId.getAndIncrement());
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platformMBeanServer.registerMBean(mbean, botObjectName);
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}
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var jmx = new JMXPooledNettyMonitoring(name, pooledMetric);
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type = "pooled";
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mbean = new StandardMBean(jmx, JMXNettyMonitoringMBean.class);
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} else {
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var jmx = new JMXNettyMonitoring(name, metric);
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type = "unpooled";
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mbean = new StandardMBean(jmx, JMXNettyMonitoringMBean.class);
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}
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ObjectName botObjectName = new ObjectName("io.netty.stats:name=ByteBufAllocator,allocatorName=" + name + ",type=" + type);
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platformMBeanServer.registerMBean(mbean, botObjectName);
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} catch (MalformedObjectNameException | NotCompliantMBeanException | InstanceAlreadyExistsException | MBeanRegistrationException e) {
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throw new RuntimeException(e);
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}
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}
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}
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