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Posted to commits@dubbo.apache.org by al...@apache.org on 2021/09/22 08:11:38 UTC
[dubbo-spi-extensions] branch master updated: add
PeakEwmaLoadBalance (#68)
This is an automated email from the ASF dual-hosted git repository.
albumenj pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/dubbo-spi-extensions.git
The following commit(s) were added to refs/heads/master by this push:
new 48abd0b add PeakEwmaLoadBalance (#68)
48abd0b is described below
commit 48abd0be229f02b25ae3d17c0b66223dacfc1133
Author: lmj <10...@qq.com>
AuthorDate: Wed Sep 22 16:11:34 2021 +0800
add PeakEwmaLoadBalance (#68)
* add PeakEwmaLoadBalance
* rename moudle
* move ASF license to first line
---
.../pom.xml | 19 +-
.../cluster/loadbalance/PeakEwmaLoadBalance.java | 137 ++++++++++
.../loadbalance/AbstractLoadBalanceTest.java | 82 ++++++
.../cluster/loadbalance/LoadBalanceBaseTest.java | 297 +++++++++++++++++++++
.../loadbalance/PeakEwmaLoadBalanceTest.java | 113 ++++++++
dubbo-cluster-extensions/pom.xml | 1 +
6 files changed, 643 insertions(+), 6 deletions(-)
diff --git a/dubbo-cluster-extensions/pom.xml b/dubbo-cluster-extensions/dubbo-cluster-loadbalance-peakewma/pom.xml
similarity index 72%
copy from dubbo-cluster-extensions/pom.xml
copy to dubbo-cluster-extensions/dubbo-cluster-loadbalance-peakewma/pom.xml
index f3a3b20..471b76d 100644
--- a/dubbo-cluster-extensions/pom.xml
+++ b/dubbo-cluster-extensions/dubbo-cluster-loadbalance-peakewma/pom.xml
@@ -19,18 +19,25 @@
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<parent>
+ <artifactId>dubbo-cluster-extensions</artifactId>
<groupId>org.apache.dubbo.extensions</groupId>
- <artifactId>extensions-parent</artifactId>
<version>${revision}</version>
<relativePath>../pom.xml</relativePath>
</parent>
<modelVersion>4.0.0</modelVersion>
- <artifactId>dubbo-cluster-extensions</artifactId>
- <packaging>pom</packaging>
- <modules>
- <module>dubbo-cluster-broadcast-1</module>
- </modules>
+ <artifactId>dubbo-cluster-loadbalance-peakewma</artifactId>
+ <packaging>jar</packaging>
+ <dependencies>
+ <dependency>
+ <groupId>org.apache.dubbo</groupId>
+ <artifactId>dubbo-cluster</artifactId>
+ </dependency>
+ <dependency>
+ <groupId>org.apache.dubbo</groupId>
+ <artifactId>dubbo-rpc-api</artifactId>
+ </dependency>
+ </dependencies>
</project>
diff --git a/dubbo-cluster-extensions/dubbo-cluster-loadbalance-peakewma/src/main/java/org/apache/dubbo/rpc/cluster/loadbalance/PeakEwmaLoadBalance.java b/dubbo-cluster-extensions/dubbo-cluster-loadbalance-peakewma/src/main/java/org/apache/dubbo/rpc/cluster/loadbalance/PeakEwmaLoadBalance.java
new file mode 100644
index 0000000..b87ae84
--- /dev/null
+++ b/dubbo-cluster-extensions/dubbo-cluster-loadbalance-peakewma/src/main/java/org/apache/dubbo/rpc/cluster/loadbalance/PeakEwmaLoadBalance.java
@@ -0,0 +1,137 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.dubbo.rpc.cluster.loadbalance;
+
+import org.apache.dubbo.common.URL;
+import org.apache.dubbo.rpc.Invocation;
+import org.apache.dubbo.rpc.Invoker;
+import org.apache.dubbo.rpc.RpcStatus;
+import org.apache.dubbo.rpc.model.ApplicationModel;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ConcurrentMap;
+import java.util.concurrent.ThreadLocalRandom;
+import java.util.concurrent.locks.ReentrantLock;
+
+/**
+ * <p>
+ * PeakEwmaLoadBalance is designed to converge quickly when encountering slow endpoints.
+ * It is quick to react to latency spikes recovering only cautiously.Peak EWMA takes
+ * history into account,so that slow behavior is penalized relative to the
+ * supplied `decayTime`.
+ * if there are multiple invokers and the same cost,then randomly called,which doesn't care
+ * about weight.
+ * <p>
+ * Inspiration drawn from:
+ * https://github.com/twitter/finagle/blob/1bc837c4feafc0096e43c0e98516a8e1c50c4421
+ * /finagle-core/src/main/scala/com/twitter/finagle/loadbalancer/PeakEwma.scala
+ */
+public class PeakEwmaLoadBalance extends AbstractLoadBalance {
+
+ public static final String NAME = "peakewma";
+
+ private static final String PEAK_EWMA_DECAY_TIME = "peakEwmaDecayTime";
+
+ private static final double PENALTY = Long.MAX_VALUE >> 16;
+
+ // The mean lifetime of `cost`, it reaches its half-life after decayTime*ln(2).
+ private static double decayTime = ApplicationModel.getEnvironment().getConfiguration().getInt(PEAK_EWMA_DECAY_TIME, 10_000);
+
+ private ConcurrentMap<RpcStatus, Metric> methodMap = new ConcurrentHashMap<>();
+
+ protected static class Metric {
+ // last timestamp in Millis we observed an runningTime
+ private volatile long lastUpdateTime;
+
+ // ewma of rtt, sensitive to peaks.
+ private volatile double cost;
+
+ // calculate running time And active num
+ private RpcStatus rpcStatus;
+ private long succeededOffset;
+ private long succeededElapsedOffset;
+
+ //lock for get and set cost
+ ReentrantLock ewmaLock = new ReentrantLock();
+
+ public Metric(RpcStatus rpcStatus) {
+ this.rpcStatus = rpcStatus;
+ this.lastUpdateTime = System.currentTimeMillis();
+ this.cost = 0.0;
+ this.succeededOffset = 0;
+ this.succeededElapsedOffset = 0;
+ }
+
+ private void observe() {
+ double rtt = 0;
+ long succeed = this.rpcStatus.getSucceeded() - this.succeededOffset;
+ if (succeed != 0) {
+ rtt = (this.rpcStatus.getSucceededElapsed() * 1.0 - this.succeededElapsedOffset) / succeed;
+ }
+
+ final long currentTime = System.currentTimeMillis();
+ long td = Math.max(currentTime - lastUpdateTime, 0);
+ double w = Math.exp(-td / decayTime);
+ if (rtt > cost) {
+ cost = rtt;
+ } else {
+ cost = cost * w + rtt * (1.0 - w);
+ }
+
+ lastUpdateTime = currentTime;
+ succeededOffset = rpcStatus.getSucceeded();
+ succeededElapsedOffset = rpcStatus.getSucceededElapsed();
+ }
+
+ private double getCost() {
+ ewmaLock.lock();
+ observe();
+ int active = rpcStatus.getActive();
+ ewmaLock.unlock();
+
+ //If we don't have any latency history, we penalize the host on the first probe.
+ return (cost == 0.0 && active != 0) ? PENALTY + active : cost * (active + 1);
+ }
+ }
+
+ @Override
+ protected <T> Invoker<T> doSelect(List<Invoker<T>> invokers, URL url, Invocation invocation) {
+ int length = invokers.size();
+ double minResponse = Double.MAX_VALUE;
+
+ List<Integer> selectInvokerIndexList = new ArrayList<>(invokers.size());
+ for (int i = 0; i < length; i++) {
+ Invoker<T> invoker = invokers.get(i);
+ RpcStatus rpcStatus = RpcStatus.getStatus(invoker.getUrl(), invocation.getMethodName());
+ Metric metric = methodMap.computeIfAbsent(rpcStatus, Metric::new);
+
+ // calculate the estimated response time from the product of active connections and succeeded average elapsed time.
+ double estimateResponse = metric.getCost();
+ if (estimateResponse < minResponse) {
+ selectInvokerIndexList.clear();
+ selectInvokerIndexList.add(i);
+ minResponse = estimateResponse;
+ } else if (estimateResponse == minResponse) {
+ selectInvokerIndexList.add(i);
+ }
+ }
+
+ return invokers.get(selectInvokerIndexList.get(ThreadLocalRandom.current().nextInt(selectInvokerIndexList.size())));
+ }
+}
diff --git a/dubbo-cluster-extensions/dubbo-cluster-loadbalance-peakewma/src/test/java/org/apache/dubbo/rpc/cluster/loadbalance/AbstractLoadBalanceTest.java b/dubbo-cluster-extensions/dubbo-cluster-loadbalance-peakewma/src/test/java/org/apache/dubbo/rpc/cluster/loadbalance/AbstractLoadBalanceTest.java
new file mode 100644
index 0000000..f880ef3
--- /dev/null
+++ b/dubbo-cluster-extensions/dubbo-cluster-loadbalance-peakewma/src/test/java/org/apache/dubbo/rpc/cluster/loadbalance/AbstractLoadBalanceTest.java
@@ -0,0 +1,82 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.dubbo.rpc.cluster.loadbalance;
+
+import org.apache.dubbo.common.URL;
+import org.apache.dubbo.common.url.component.ServiceConfigURL;
+import org.apache.dubbo.rpc.Invocation;
+import org.apache.dubbo.rpc.Invoker;
+import org.apache.dubbo.rpc.RpcInvocation;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+import org.mockito.Mockito;
+
+import java.util.HashMap;
+import java.util.List;
+
+import static org.apache.dubbo.common.constants.CommonConstants.TIMESTAMP_KEY;
+import static org.apache.dubbo.common.constants.RegistryConstants.REGISTRY_KEY;
+import static org.apache.dubbo.rpc.cluster.Constants.WEIGHT_KEY;
+import static org.mockito.BDDMockito.given;
+import static org.mockito.Mockito.mock;
+
+public class AbstractLoadBalanceTest {
+
+ private AbstractLoadBalance balance = new AbstractLoadBalance() {
+ @Override
+ protected <T> Invoker<T> doSelect(List<Invoker<T>> invokers, URL url, Invocation invocation) {
+ return null;
+ }
+ };
+
+ @Test
+ public void testGetWeight() {
+ RpcInvocation invocation = new RpcInvocation();
+ invocation.setMethodName("say");
+
+ Invoker invoker1 = mock(Invoker.class, Mockito.withSettings().stubOnly());
+ URL url1 = new ServiceConfigURL("", "", 0, "DemoService", new HashMap<>());
+ url1 = url1.addParameter(TIMESTAMP_KEY, System.currentTimeMillis() - Integer.MAX_VALUE - 1);
+ given(invoker1.getUrl()).willReturn(url1);
+
+ Invoker invoker2 = mock(Invoker.class, Mockito.withSettings().stubOnly());
+ URL url2 = new ServiceConfigURL("", "", 0, "DemoService", new HashMap<>());
+ url2 = url2.addParameter(TIMESTAMP_KEY, System.currentTimeMillis() - 10 * 60 * 1000L - 1);
+ given(invoker2.getUrl()).willReturn(url2);
+
+ Assertions.assertEquals(balance.getWeight(invoker1, invocation), balance.getWeight(invoker2, invocation));
+ }
+
+ @Test
+ public void testGetRegistryWeight() {
+ RpcInvocation invocation = new RpcInvocation();
+ invocation.setMethodName("say");
+
+ Invoker invoker1 = mock(Invoker.class, Mockito.withSettings().stubOnly());
+ URL url1 = new ServiceConfigURL("", "", 0, "DemoService", new HashMap<>());
+ url1 = url1.addParameter(REGISTRY_KEY + "." + WEIGHT_KEY, 10);
+ given(invoker1.getUrl()).willReturn(url1);
+
+ Invoker invoker2 = mock(Invoker.class, Mockito.withSettings().stubOnly());
+ URL url2 = new ServiceConfigURL("", "", 0, "org.apache.dubbo.registry.RegistryService", new HashMap<>());
+ url2 = url2.addParameter(REGISTRY_KEY + "." + WEIGHT_KEY, 20);
+ given(invoker2.getUrl()).willReturn(url2);
+
+ Assertions.assertEquals(100, balance.getWeight(invoker1, invocation));
+ Assertions.assertEquals(20, balance.getWeight(invoker2, invocation));
+ }
+}
diff --git a/dubbo-cluster-extensions/dubbo-cluster-loadbalance-peakewma/src/test/java/org/apache/dubbo/rpc/cluster/loadbalance/LoadBalanceBaseTest.java b/dubbo-cluster-extensions/dubbo-cluster-loadbalance-peakewma/src/test/java/org/apache/dubbo/rpc/cluster/loadbalance/LoadBalanceBaseTest.java
new file mode 100644
index 0000000..46cce2e
--- /dev/null
+++ b/dubbo-cluster-extensions/dubbo-cluster-loadbalance-peakewma/src/test/java/org/apache/dubbo/rpc/cluster/loadbalance/LoadBalanceBaseTest.java
@@ -0,0 +1,297 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License")); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.dubbo.rpc.cluster.loadbalance;
+
+import com.alibaba.fastjson.JSON;
+import org.apache.dubbo.common.URL;
+import org.apache.dubbo.common.extension.ExtensionLoader;
+import org.apache.dubbo.rpc.Invocation;
+import org.apache.dubbo.rpc.Invoker;
+import org.apache.dubbo.rpc.RpcInvocation;
+import org.apache.dubbo.rpc.RpcStatus;
+import org.apache.dubbo.rpc.cluster.LoadBalance;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.mockito.Mockito;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.atomic.AtomicLong;
+
+import static org.apache.dubbo.rpc.cluster.Constants.DEFAULT_WARMUP;
+import static org.apache.dubbo.rpc.cluster.Constants.DEFAULT_WEIGHT;
+import static org.mockito.BDDMockito.given;
+import static org.mockito.Mockito.mock;
+
+/**
+ * baseTest
+ */
+@SuppressWarnings({"unchecked", "rawtypes"})
+public class LoadBalanceBaseTest {
+ Invocation invocation;
+ List<Invoker<LoadBalanceBaseTest>> invokers = new ArrayList<Invoker<LoadBalanceBaseTest>>();
+ Invoker<LoadBalanceBaseTest> invoker1;
+ Invoker<LoadBalanceBaseTest> invoker2;
+ Invoker<LoadBalanceBaseTest> invoker3;
+ Invoker<LoadBalanceBaseTest> invoker4;
+ Invoker<LoadBalanceBaseTest> invoker5;
+
+ RpcStatus weightTestRpcStatus1;
+ RpcStatus weightTestRpcStatus2;
+ RpcStatus weightTestRpcStatus3;
+ RpcStatus weightTestRpcStatus5;
+
+ RpcInvocation weightTestInvocation;
+
+ /**
+ * @throws Exception
+ */
+ @BeforeAll
+ public static void setUpBeforeClass() throws Exception {
+ }
+
+ /**
+ * @throws Exception
+ */
+ @BeforeEach
+ public void setUp() throws Exception {
+
+ invocation = mock(Invocation.class);
+ given(invocation.getMethodName()).willReturn("method1");
+ given(invocation.getArguments()).willReturn(new Object[]{"arg1", "arg2", "arg3"});
+
+ invoker1 = mock(Invoker.class);
+ invoker2 = mock(Invoker.class);
+ invoker3 = mock(Invoker.class);
+ invoker4 = mock(Invoker.class);
+ invoker5 = mock(Invoker.class);
+
+ URL url1 = URL.valueOf("test://127.0.0.1:1/DemoService");
+ URL url2 = URL.valueOf("test://127.0.0.1:2/DemoService");
+ URL url3 = URL.valueOf("test://127.0.0.1:3/DemoService");
+ URL url4 = URL.valueOf("test://127.0.0.1:4/DemoService");
+ URL url5 = URL.valueOf("test://127.0.0.1:5/DemoService");
+
+ given(invoker1.isAvailable()).willReturn(true);
+ given(invoker1.getInterface()).willReturn(LoadBalanceBaseTest.class);
+ given(invoker1.getUrl()).willReturn(url1);
+
+ given(invoker2.isAvailable()).willReturn(true);
+ given(invoker2.getInterface()).willReturn(LoadBalanceBaseTest.class);
+ given(invoker2.getUrl()).willReturn(url2);
+
+ given(invoker3.isAvailable()).willReturn(true);
+ given(invoker3.getInterface()).willReturn(LoadBalanceBaseTest.class);
+ given(invoker3.getUrl()).willReturn(url3);
+
+ given(invoker4.isAvailable()).willReturn(true);
+ given(invoker4.getInterface()).willReturn(LoadBalanceBaseTest.class);
+ given(invoker4.getUrl()).willReturn(url4);
+
+ given(invoker5.isAvailable()).willReturn(true);
+ given(invoker5.getInterface()).willReturn(LoadBalanceBaseTest.class);
+ given(invoker5.getUrl()).willReturn(url5);
+
+ invokers.add(invoker1);
+ invokers.add(invoker2);
+ invokers.add(invoker3);
+ invokers.add(invoker4);
+ invokers.add(invoker5);
+ }
+
+ public Map<Invoker, AtomicLong> getInvokeCounter(int runs, String loadbalanceName) {
+ Map<Invoker, AtomicLong> counter = new ConcurrentHashMap<Invoker, AtomicLong>();
+ LoadBalance lb = getLoadBalance(loadbalanceName);
+ for (Invoker invoker : invokers) {
+ counter.put(invoker, new AtomicLong(0));
+ }
+ URL url = invokers.get(0).getUrl();
+ for (int i = 0; i < runs; i++) {
+ Invoker sinvoker = lb.select(invokers, url, invocation);
+ counter.get(sinvoker).incrementAndGet();
+ }
+ return counter;
+ }
+
+ protected AbstractLoadBalance getLoadBalance(String loadbalanceName) {
+ return (AbstractLoadBalance) ExtensionLoader.getExtensionLoader(LoadBalance.class).getExtension(loadbalanceName);
+ }
+
+ @Test
+ public void testLoadBalanceWarmup() {
+ Assertions.assertEquals(1, calculateDefaultWarmupWeight(0));
+ Assertions.assertEquals(1, calculateDefaultWarmupWeight(13));
+ Assertions.assertEquals(1, calculateDefaultWarmupWeight(6 * 1000));
+ Assertions.assertEquals(2, calculateDefaultWarmupWeight(12 * 1000));
+ Assertions.assertEquals(10, calculateDefaultWarmupWeight(60 * 1000));
+ Assertions.assertEquals(50, calculateDefaultWarmupWeight(5 * 60 * 1000));
+ Assertions.assertEquals(50, calculateDefaultWarmupWeight(5 * 60 * 1000 + 23));
+ Assertions.assertEquals(50, calculateDefaultWarmupWeight(5 * 60 * 1000 + 5999));
+ Assertions.assertEquals(51, calculateDefaultWarmupWeight(5 * 60 * 1000 + 6000));
+ Assertions.assertEquals(90, calculateDefaultWarmupWeight(9 * 60 * 1000));
+ Assertions.assertEquals(98, calculateDefaultWarmupWeight(10 * 60 * 1000 - 12 * 1000));
+ Assertions.assertEquals(99, calculateDefaultWarmupWeight(10 * 60 * 1000 - 6 * 1000));
+ Assertions.assertEquals(100, calculateDefaultWarmupWeight(10 * 60 * 1000));
+ Assertions.assertEquals(100, calculateDefaultWarmupWeight(20 * 60 * 1000));
+ }
+
+ /**
+ * handle default data
+ *
+ * @return
+ */
+ private static int calculateDefaultWarmupWeight(int uptime) {
+ return AbstractLoadBalance.calculateWarmupWeight(uptime, DEFAULT_WARMUP, DEFAULT_WEIGHT);
+ }
+
+ /*------------------------------------test invokers for weight---------------------------------------*/
+
+ protected static class InvokeResult {
+ private AtomicLong count = new AtomicLong();
+ private int weight = 0;
+ private int totalWeight = 0;
+
+ public InvokeResult(int weight) {
+ this.weight = weight;
+ }
+
+ public AtomicLong getCount() {
+ return count;
+ }
+
+ public int getWeight() {
+ return weight;
+ }
+
+ public int getTotalWeight() {
+ return totalWeight;
+ }
+
+ public void setTotalWeight(int totalWeight) {
+ this.totalWeight = totalWeight;
+ }
+
+ public int getExpected(int runCount) {
+ return getWeight() * runCount / getTotalWeight();
+ }
+
+ public float getDeltaPercentage(int runCount) {
+ int expected = getExpected(runCount);
+ return Math.abs((expected - getCount().get()) * 100.0f / expected);
+ }
+
+ @Override
+ public String toString() {
+ return JSON.toJSONString(this);
+ }
+ }
+
+ protected List<Invoker<LoadBalanceBaseTest>> weightInvokers = new ArrayList<Invoker<LoadBalanceBaseTest>>();
+ protected List<Invoker<LoadBalanceBaseTest>> weightInvokersSR = new ArrayList<Invoker<LoadBalanceBaseTest>>();
+
+ protected Invoker<LoadBalanceBaseTest> weightInvoker1;
+ protected Invoker<LoadBalanceBaseTest> weightInvoker2;
+ protected Invoker<LoadBalanceBaseTest> weightInvoker3;
+ protected Invoker<LoadBalanceBaseTest> weightInvokerTmp;
+ protected Invoker<LoadBalanceBaseTest> weightInvoker5;
+
+ @BeforeEach
+ public void before() throws Exception {
+ weightInvoker1 = mock(Invoker.class, Mockito.withSettings().stubOnly());
+ weightInvoker2 = mock(Invoker.class, Mockito.withSettings().stubOnly());
+ weightInvoker3 = mock(Invoker.class, Mockito.withSettings().stubOnly());
+ weightInvokerTmp = mock(Invoker.class, Mockito.withSettings().stubOnly());
+ weightInvoker5 = mock(Invoker.class, Mockito.withSettings().stubOnly());
+
+ weightTestInvocation = new RpcInvocation();
+ weightTestInvocation.setMethodName("test");
+
+ URL url1 = URL.valueOf("test1://127.0.0.1:11/DemoService?weight=1&active=0");
+ URL url2 = URL.valueOf("test2://127.0.0.1:12/DemoService?weight=9&active=0");
+ URL url3 = URL.valueOf("test3://127.0.0.1:13/DemoService?weight=6&active=1");
+ URL urlTmp = URL.valueOf("test4://127.0.0.1:9999/DemoService?weight=11&active=0");
+ URL url5 = URL.valueOf("test5://127.0.0.1:15/DemoService?weight=15&active=0");
+
+ given(weightInvoker1.isAvailable()).willReturn(true);
+ given(weightInvoker1.getInterface()).willReturn(LoadBalanceBaseTest.class);
+ given(weightInvoker1.getUrl()).willReturn(url1);
+
+ given(weightInvoker2.isAvailable()).willReturn(true);
+ given(weightInvoker2.getInterface()).willReturn(LoadBalanceBaseTest.class);
+ given(weightInvoker2.getUrl()).willReturn(url2);
+
+ given(weightInvoker3.isAvailable()).willReturn(true);
+ given(weightInvoker3.getInterface()).willReturn(LoadBalanceBaseTest.class);
+ given(weightInvoker3.getUrl()).willReturn(url3);
+
+ given(weightInvokerTmp.isAvailable()).willReturn(true);
+ given(weightInvokerTmp.getInterface()).willReturn(LoadBalanceBaseTest.class);
+ given(weightInvokerTmp.getUrl()).willReturn(urlTmp);
+
+ given(weightInvoker5.isAvailable()).willReturn(true);
+ given(weightInvoker5.getInterface()).willReturn(LoadBalanceBaseTest.class);
+ given(weightInvoker5.getUrl()).willReturn(url5);
+
+ weightInvokers.add(weightInvoker1);
+ weightInvokers.add(weightInvoker2);
+ weightInvokers.add(weightInvoker3);
+
+ weightInvokersSR.add(weightInvoker1);
+ weightInvokersSR.add(weightInvoker2);
+ weightInvokersSR.add(weightInvoker5);
+
+ weightTestRpcStatus1 = RpcStatus.getStatus(weightInvoker1.getUrl(), weightTestInvocation.getMethodName());
+ weightTestRpcStatus2 = RpcStatus.getStatus(weightInvoker2.getUrl(), weightTestInvocation.getMethodName());
+ weightTestRpcStatus3 = RpcStatus.getStatus(weightInvoker3.getUrl(), weightTestInvocation.getMethodName());
+ weightTestRpcStatus5 = RpcStatus.getStatus(weightInvoker5.getUrl(), weightTestInvocation.getMethodName());
+
+
+ // weightTestRpcStatus3 active is 1
+ RpcStatus.beginCount(weightInvoker3.getUrl(), weightTestInvocation.getMethodName());
+
+ // weightTestRpcStatus5 shortest response time of success calls is bigger than 0
+ // weightTestRpcStatus5 active is 1
+ RpcStatus.beginCount(weightInvoker5.getUrl(), weightTestInvocation.getMethodName());
+ RpcStatus.endCount(weightInvoker5.getUrl(), weightTestInvocation.getMethodName(), 5000L, true);
+ RpcStatus.beginCount(weightInvoker5.getUrl(), weightTestInvocation.getMethodName());
+ }
+
+ protected Map<Invoker, InvokeResult> getWeightedInvokeResult(int runs, String loadbalanceName) {
+ Map<Invoker, InvokeResult> counter = new ConcurrentHashMap<Invoker, InvokeResult>();
+ AbstractLoadBalance lb = getLoadBalance(loadbalanceName);
+ int totalWeight = 0;
+ for (int i = 0; i < weightInvokers.size(); i++) {
+ InvokeResult invokeResult = new InvokeResult(lb.getWeight(weightInvokers.get(i), weightTestInvocation));
+ counter.put(weightInvokers.get(i), invokeResult);
+ totalWeight += invokeResult.getWeight();
+ }
+ for (InvokeResult invokeResult : counter.values()) {
+ invokeResult.setTotalWeight(totalWeight);
+ }
+ URL url = weightInvokers.get(0).getUrl();
+ for (int i = 0; i < runs; i++) {
+ Invoker sinvoker = lb.select(weightInvokers, url, weightTestInvocation);
+ counter.get(sinvoker).getCount().incrementAndGet();
+ }
+ return counter;
+ }
+
+}
diff --git a/dubbo-cluster-extensions/dubbo-cluster-loadbalance-peakewma/src/test/java/org/apache/dubbo/rpc/cluster/loadbalance/PeakEwmaLoadBalanceTest.java b/dubbo-cluster-extensions/dubbo-cluster-loadbalance-peakewma/src/test/java/org/apache/dubbo/rpc/cluster/loadbalance/PeakEwmaLoadBalanceTest.java
new file mode 100644
index 0000000..13957db
--- /dev/null
+++ b/dubbo-cluster-extensions/dubbo-cluster-loadbalance-peakewma/src/test/java/org/apache/dubbo/rpc/cluster/loadbalance/PeakEwmaLoadBalanceTest.java
@@ -0,0 +1,113 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License")); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.dubbo.rpc.cluster.loadbalance;
+
+import org.apache.dubbo.rpc.Invoker;
+import org.apache.dubbo.rpc.RpcStatus;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.Callable;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ThreadLocalRandom;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.stream.IntStream;
+
+/**
+ * PeakEwmaLoadBalanceTest
+ */
+public class PeakEwmaLoadBalanceTest extends LoadBalanceBaseTest {
+
+ private static final int THREAD_NUM = 4;
+
+ private static final int INVOKE_NUM = 2_000;
+
+ private static final long SHAKE_TIME = 50;
+
+ private AtomicInteger sumInvoker1 = new AtomicInteger(0);
+ private AtomicInteger sumInvoker2 = new AtomicInteger(0);
+ private AtomicInteger sumInvoker5 = new AtomicInteger(0);
+
+ @Test
+ public void testWithoutShake() throws InterruptedException {
+ //active -> 0
+ RpcStatus.endCount(weightInvoker5.getUrl(), weightTestInvocation.getMethodName(), 0L, true);
+
+ List<Callable<Boolean>> tasks = new ArrayList<>();
+ IntStream.range(0, THREAD_NUM).forEach(e -> tasks.add(getTask(false)));
+
+ ExecutorService executorService = Executors.newFixedThreadPool(THREAD_NUM);
+ executorService.invokeAll(tasks);
+
+ Assertions.assertTrue(Math.abs(sumInvoker2.get() - sumInvoker1.get()) <= INVOKE_NUM);
+ }
+
+ @Test
+ public void testWithShake() throws InterruptedException {
+ //active -> 0
+ RpcStatus.endCount(weightInvoker5.getUrl(), weightTestInvocation.getMethodName(), 0L, true);
+
+ List<Callable<Boolean>> tasks = new ArrayList<>();
+ IntStream.range(0, THREAD_NUM).forEach(e -> tasks.add(getTask(true)));
+
+ ExecutorService executorService = Executors.newFixedThreadPool(THREAD_NUM);
+ executorService.invokeAll(tasks);
+
+ Assertions.assertTrue(sumInvoker1.get() <= INVOKE_NUM);
+ }
+
+ private Callable<Boolean> getTask(boolean needShake) {
+ PeakEwmaLoadBalance lb = new PeakEwmaLoadBalance();
+ return () -> {
+ boolean needShakeTemp = needShake;
+ for (int i = 0; i < INVOKE_NUM; i++) {
+ Invoker selected = lb.select(weightInvokersSR, null, weightTestInvocation);
+ RpcStatus rpcStatus = RpcStatus.getStatus(selected.getUrl(), weightTestInvocation.getMethodName());
+
+ if (i > 100 && needShakeTemp && selected.getUrl().getProtocol().equals("test1")) {
+ //invoker1 shake
+ needShakeTemp = false;
+ rpcStatus.beginCount(selected.getUrl(), weightTestInvocation.getMethodName());
+ TimeUnit.MICROSECONDS.sleep(SHAKE_TIME);
+ rpcStatus.endCount(selected.getUrl(), weightTestInvocation.getMethodName(), SHAKE_TIME, true);
+ } else {
+ rpcStatus.beginCount(selected.getUrl(), weightTestInvocation.getMethodName());
+ long time = ThreadLocalRandom.current().nextLong(5, 10);
+ TimeUnit.MICROSECONDS.sleep(time);
+ rpcStatus.endCount(selected.getUrl(), weightTestInvocation.getMethodName(), time, true);
+ }
+
+ if (selected.getUrl().getProtocol().equals("test1")) {
+ sumInvoker1.incrementAndGet();
+ }
+
+ if (selected.getUrl().getProtocol().equals("test2")) {
+ sumInvoker2.incrementAndGet();
+ }
+
+ if (selected.getUrl().getProtocol().equals("test5")) {
+ sumInvoker5.incrementAndGet();
+ }
+ }
+ return true;
+ };
+ }
+}
diff --git a/dubbo-cluster-extensions/pom.xml b/dubbo-cluster-extensions/pom.xml
index f3a3b20..5dc0c1e 100644
--- a/dubbo-cluster-extensions/pom.xml
+++ b/dubbo-cluster-extensions/pom.xml
@@ -30,6 +30,7 @@
<packaging>pom</packaging>
<modules>
<module>dubbo-cluster-broadcast-1</module>
+ <module>dubbo-cluster-loadbalance-peakewma</module>
</modules>