init

sentinel/sentinel-demo/sentinel-demo-etcd-datasource/pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         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>sentinel-demo</artifactId>
+        <groupId>com.alibaba.csp</groupId>
+        <version>1.8.3</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>sentinel-demo-etcd-datasource</artifactId>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.alibaba.csp</groupId>
+            <artifactId>sentinel-core</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>com.alibaba.csp</groupId>
+            <artifactId>sentinel-datasource-etcd</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>com.alibaba</groupId>
+            <artifactId>fastjson</artifactId>
+        </dependency>
+    </dependencies>
+
+</project>

sentinel/sentinel-demo/sentinel-demo-etcd-datasource/src/main/java/com/alibaba/csp/sentinel/demo/datasource/etcd/EtcdConfigSender.java

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+/*
+ * Copyright 1999-2018 Alibaba Group Holding Ltd.
+ *
+ * Licensed 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 com.alibaba.csp.sentinel.demo.datasource.etcd;
+
+
+import io.etcd.jetcd.ByteSequence;
+import io.etcd.jetcd.Client;
+
+/**
+ * Etcd config sender for demo.
+ *
+ * @author lianglin
+ * @since 1.7.0
+ */
+public class EtcdConfigSender {
+
+    public static void main(String[] args) throws InterruptedException {
+
+
+        String rule_key = "sentinel_demo_rule_key";
+
+        Client client = Client.builder()
+                .endpoints("http://127.0.0.1:2379")
+                .user(ByteSequence.from("root".getBytes()))
+                .password(ByteSequence.from("12345".getBytes()))
+                .build();
+        final String rule = "[\n"
+                + "  {\n"
+                + "    \"resource\": \"TestResource\",\n"
+                + "    \"controlBehavior\": 0,\n"
+                + "    \"count\": 5.0,\n"
+                + "    \"grade\": 1,\n"
+                + "    \"limitApp\": \"default\",\n"
+                + "    \"strategy\": 0\n"
+                + "  }\n"
+                + "]";
+        client.getKVClient()
+                .put(ByteSequence.from(rule_key.getBytes()), ByteSequence.from(rule.getBytes()));
+
+        System.out.println("setting rule success");
+        Thread.sleep(10000);
+
+    }
+
+}

sentinel/sentinel-demo/sentinel-demo-etcd-datasource/src/main/java/com/alibaba/csp/sentinel/demo/datasource/etcd/EtcdDataSourceDemo.java

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+/*
+ * Copyright 1999-2018 Alibaba Group Holding Ltd.
+ *
+ * Licensed 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 com.alibaba.csp.sentinel.demo.datasource.etcd;
+
+import com.alibaba.csp.sentinel.config.SentinelConfig;
+import com.alibaba.csp.sentinel.datasource.ReadableDataSource;
+import com.alibaba.csp.sentinel.datasource.etcd.EtcdConfig;
+import com.alibaba.csp.sentinel.datasource.etcd.EtcdDataSource;
+import com.alibaba.csp.sentinel.slots.block.flow.FlowRule;
+import com.alibaba.csp.sentinel.slots.block.flow.FlowRuleManager;
+import com.alibaba.fastjson.JSON;
+
+import java.util.List;
+
+/**
+ * @author lianglin
+ * @since 1.7.0
+ */
+public class EtcdDataSourceDemo {
+
+    public static void main(String[] args) {
+
+        String rule_key = "sentinel_demo_rule_key";
+        String yourUserName = "root";
+        String yourPassWord = "12345";
+        String endPoints = "http://127.0.0.1:2379";
+        SentinelConfig.setConfig(EtcdConfig.END_POINTS, endPoints);
+        SentinelConfig.setConfig(EtcdConfig.USER, yourUserName);
+        SentinelConfig.setConfig(EtcdConfig.PASSWORD, yourPassWord);
+        SentinelConfig.setConfig(EtcdConfig.CHARSET, "utf-8");
+        SentinelConfig.setConfig(EtcdConfig.AUTH_ENABLE, "true");
+
+        ReadableDataSource<String, List<FlowRule>> flowRuleEtcdDataSource = new EtcdDataSource<>(rule_key, (rule) -> JSON.parseArray(rule, FlowRule.class));
+        FlowRuleManager.register2Property(flowRuleEtcdDataSource.getProperty());
+        List<FlowRule> rules = FlowRuleManager.getRules();
+        System.out.println(rules);
+    }
+
+}