add common func for mimeter (#796)

jcommon/pom.xml

@@ -98,6 +98,7 @@
         <module>match</module>
         <module>infra-common</module>
         <module>mockjs</module>
+        <module>sysFunc</module>
     </modules>
 
 

jcommon/sysFunc/pom.xml

@@ -0,0 +1,25 @@
+<?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>jcommon</artifactId>
+        <groupId>run.mone</groupId>
+        <version>1.4-SNAPSHOT</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>sysFunc</artifactId>
+
+    <dependencies>
+
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-lang3</artifactId>
+            <version>3.12.0</version>
+        </dependency>
+
+    </dependencies>
+
+
+</project>

jcommon/sysFunc/src/main/java/run/mone/sysFunc/SysFuncConst.java

@@ -0,0 +1,10 @@
+package run.mone.sysFunc;
+
+public class SysFuncConst {
+
+    public static final String FUNC_NAME_SUBSTRING = "java.substring";
+
+    public static final String FUNC_NAME_UUID = "java.uuid";
+
+    public static final String FUNC_NAME_RANDOM_NUMBER = "java.randomNumber";
+}

jcommon/sysFunc/src/main/java/run/mone/sysFunc/SysFuncEnum.java

@@ -0,0 +1,28 @@
+package run.mone.sysFunc;
+
+import static run.mone.sysFunc.SysFuncConst.*;
+
+public enum SysFuncEnum {
+
+    //报警级别
+    SUBSTRING(FUNC_NAME_SUBSTRING, "common", "截取字符串", "${java.substring(ceshi, 1, 3)}",
+            "返回从指定开始索引到结束索引之间的子字符串，但不包括结束索引位置的字符"),
+    UUID(FUNC_NAME_UUID, "common", "唯一标识符", "{java.uuid()}",
+            "标准化的唯一标识符"),
+    RANDOM_NUMBER(FUNC_NAME_RANDOM_NUMBER, "common", "随机数", "${java.randomNumber(2, 11)}",
+            "生成指定范围的整型数字");
+
+    public String cname;
+    public String name;
+    public String type;
+    public String desc;
+    public String example;
+
+    SysFuncEnum(String name, String type, String cname, String example, String desc) {
+        this.name = name;
+        this.type = type;
+        this.cname = cname;
+        this.desc = desc;
+        this.example = example;
+    }
+}

jcommon/sysFunc/src/main/java/run/mone/sysFunc/SysFuncUtils.java

@@ -0,0 +1,84 @@
+package run.mone.sysFunc;
+
+import org.apache.commons.lang3.StringUtils;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.UUID;
+import java.util.concurrent.ThreadLocalRandom;
+import java.util.stream.Collectors;
+
+import static run.mone.sysFunc.SysFuncConst.*;
+
+public class SysFuncUtils {
+
+    /**
+     * eg. ${java.substring("ceshi", 1, 3)}
+     *
+     * @param funcDesc
+     * @return
+     */
+    public static String gen(String funcDesc) {
+        if (StringUtils.isEmpty(funcDesc)
+                || !funcDesc.startsWith("${")
+                || !funcDesc.endsWith("}")) {
+            //不做任何处理，直接返回
+            return funcDesc;
+        }
+
+        String func = funcDesc.substring(2, funcDesc.length() - 1);
+        int index = func.indexOf("(");
+        String funcName = func.substring(0, index);
+        String funcParams = func.substring(index + 1, func.length() - 1);
+        String[] funcParamArr = funcParams.split(",");
+        List<String> funcParamList = Arrays.asList(funcParamArr).stream().map(it -> it.trim()).collect(Collectors.toList());
+
+        switch (funcName) {
+            case FUNC_NAME_SUBSTRING: {
+                return subString(funcParamList, funcParams);
+            }
+            case FUNC_NAME_UUID: {
+                return uuid();
+            }
+            case FUNC_NAME_RANDOM_NUMBER: {
+                return randomNumber(funcParamList, funcParams);
+            }
+            default:
+                return funcDesc;
+        }
+    }
+
+    private static String subString(List<String> funcParamList, String defaultStr) {
+
+        //substring(int beginIndex)
+        if (funcParamList.size() == 2) {
+            return funcParamList.get(0).substring(Integer.valueOf(funcParamList.get(1)));
+        }
+
+        //substring(int beginIndex, int endIndex)
+        if (funcParamList.size() == 3) {
+            return funcParamList.get(0).substring(Integer.valueOf(funcParamList.get(1)), Integer.valueOf(funcParamList.get(2)));
+        }
+
+        return defaultStr;
+    }
+
+    private static String uuid() {
+        UUID uuid = UUID.randomUUID();
+        return uuid.toString();
+    }
+
+    private static String randomNumber(List<String> funcParamList, String defaultStr) {
+        if (funcParamList.size() == 2) {
+            int randomNumberInRange = ThreadLocalRandom.current().nextInt(Integer.valueOf(funcParamList.get(0)), Integer.valueOf(funcParamList.get(1)));
+            return String.valueOf(randomNumberInRange);
+        }
+
+        if (funcParamList.size() == 1) {
+            int randomNumberInRange = ThreadLocalRandom.current().nextInt(Integer.valueOf(funcParamList.get(0)));
+            return String.valueOf(randomNumberInRange);
+        }
+
+        return defaultStr;
+    }
+}

jcommon/sysFunc/src/test/java/run/mone/sysFunc/test/SysFuncTest.java

@@ -0,0 +1,30 @@
+package run.mone.sysFunc.test;
+
+import org.junit.Ignore;
+import org.junit.Test;
+import run.mone.sysFunc.SysFuncUtils;
+
+@Ignore
+public class SysFuncTest {
+
+    @Test
+    public void testSubstring() {
+        String res = SysFuncUtils.gen("${java.substring(ceshi, 1, 3)}");
+        System.out.println(res);
+    }
+
+    @Test
+    public void testUuid() {
+        String res = SysFuncUtils.gen("${java.uuid()}");
+        System.out.println(res);
+    }
+
+    @Test
+    public void testRandomNumber() {
+        String res = SysFuncUtils.gen("${java.randomNumber(2,11)}");
+        System.out.println(res);
+    }
+
+
+
+}