chore: minor refactor for v0.5.0 (#13)

* chore: refactor GreptimeOptions

* chore: v0.5.0

* chore: require database name on start

* chore: require database name on start

* chore: warn on empty database name not sets

* chore: add TestConnector

* chore: more friendly write api

* chore: shutdown on test

* chore: refactor demos

* chore: add jdbc demo

Author: fengjiachun

ingester-all/pom.xml

@@ -4,7 +4,7 @@
     <parent>
         <artifactId>greptimedb-ingester</artifactId>
         <groupId>io.greptime</groupId>
-        <version>0.4.0</version>
+        <version>0.5.0</version>
     </parent>
 
     <artifactId>ingester-all</artifactId>

ingester-common/pom.xml

@@ -4,7 +4,7 @@
     <parent>
         <artifactId>greptimedb-ingester</artifactId>
         <groupId>io.greptime</groupId>
-        <version>0.4.0</version>
+        <version>0.5.0</version>
     </parent>
 
     <artifactId>ingester-common</artifactId>

ingester-example/pom.xml

@@ -4,7 +4,7 @@
     <parent>
         <artifactId>greptimedb-ingester</artifactId>
         <groupId>io.greptime</groupId>
-        <version>0.4.0</version>
+        <version>0.5.0</version>
     </parent>
 
     <artifactId>ingester-example</artifactId>
@@ -38,5 +38,12 @@
             <artifactId>log4j-slf4j-impl</artifactId>
             <scope>compile</scope>
         </dependency>
+
+        <!-- MySQL usage dependency -->
+        <dependency>
+            <groupId>mysql</groupId>
+            <artifactId>mysql-connector-java</artifactId>
+            <version>8.0.33</version>
+        </dependency>
     </dependencies>
 </project>

ingester-example/src/main/java/io/greptime/MyMetric2.java renamed to ingester-example/src/main/java/io/greptime/Cpu.java

@@ -18,40 +18,29 @@
 import io.greptime.models.Column;
 import io.greptime.models.DataType;
 import io.greptime.models.Metric;
-import java.util.Date;
 
 /**
  * @author jiachun.fjc
  */
-@Metric(name = "my_metric2")
-public class MyMetric2 {
-    @Column(name = "tag1", tag = true, dataType = DataType.String)
-    private String tag1;
-    @Column(name = "tag2", tag = true, dataType = DataType.String)
-    private String tag2;
+@Metric(name = "cpu_metric")
+public class Cpu {
+    @Column(name = "host", tag = true, dataType = DataType.String)
+    private String host;
 
-    @Column(name = "ts", timestamp = true, dataType = DataType.TimestampSecond)
+    @Column(name = "ts", timestamp = true, dataType = DataType.TimestampMillisecond)
     private long ts;
 
-    @Column(name = "field1", dataType = DataType.Date)
-    private Date field1;
-    @Column(name = "field2", dataType = DataType.Float64)
-    private double field2;
+    @Column(name = "cpu_user", dataType = DataType.Float64)
+    private double cpuUser;
+    @Column(name = "cpu_sys", dataType = DataType.Float64)
+    private double cpuSys;
 
-    public String getTag1() {
-        return tag1;
+    public String getHost() {
+        return host;
     }
 
-    public void setTag1(String tag1) {
-        this.tag1 = tag1;
-    }
-
-    public String getTag2() {
-        return tag2;
-    }
-
-    public void setTag2(String tag2) {
-        this.tag2 = tag2;
+    public void setHost(String host) {
+        this.host = host;
     }
 
     public long getTs() {
@@ -62,19 +51,19 @@ public void setTs(long ts) {
         this.ts = ts;
     }
 
-    public Date getField1() {
-        return field1;
+    public double getCpuUser() {
+        return cpuUser;
     }
 
-    public void setField1(Date field1) {
-        this.field1 = field1;
+    public void setCpuUser(double cpuUser) {
+        this.cpuUser = cpuUser;
     }
 
-    public double getField2() {
-        return field2;
+    public double getCpuSys() {
+        return cpuSys;
     }
 
-    public void setField2(double field2) {
-        this.field2 = field2;
+    public void setCpuSys(double cpuSys) {
+        this.cpuSys = cpuSys;
     }
 }

ingester-example/src/main/java/io/greptime/Memory.java

@@ -0,0 +1,59 @@
+/*
+ * Copyright 2023 Greptime Team
+ *
+ * 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 io.greptime;
+
+import io.greptime.models.Column;
+import io.greptime.models.DataType;
+import io.greptime.models.Metric;
+
+/**
+ * @author jiachun.fjc
+ */
+@Metric(name = "mem_metric")
+public class Memory {
+    @Column(name = "host", tag = true, dataType = DataType.String)
+    private String host;
+
+    @Column(name = "ts", timestamp = true, dataType = DataType.TimestampMillisecond)
+    private long ts;
+
+    @Column(name = "mem_usage", dataType = DataType.Float64)
+    private double memUsage;
+
+    public String getHost() {
+        return host;
+    }
+
+    public void setHost(String host) {
+        this.host = host;
+    }
+
+    public long getTs() {
+        return ts;
+    }
+
+    public void setTs(long ts) {
+        this.ts = ts;
+    }
+
+    public double getMemUsage() {
+        return memUsage;
+    }
+
+    public void setMemUsage(double memUsage) {
+        this.memUsage = memUsage;
+    }
+}