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‎.editorconfig‎

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# EditorConfig is awesome: http://EditorConfig.org
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# top-most EditorConfig file
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root = true
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# Unix-style newlines with a newline ending every file
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[*]
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end_of_line = lf
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insert_final_newline = true
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# Matches multiple files with brace expansion notation
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# Set default charset
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[*.{js,py,xml,java}]
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charset = utf-8
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# 4 space indentation
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[*.xml]
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indent_style = space
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indent_size = 2
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[*.java]
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indent_style = space
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indent_size = 4
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# Tab indentation (no size specified)
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[Makefile]
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indent_style = tab
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# Indentation override for all JS under lib directory
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[lib/**.js]
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indent_style = space
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indent_size = 2
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# Matches the exact files either package.json or .travis.yml
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[{package.json,.travis.yml}]
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indent_style = space
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indent_size = 2

‎.gitignore‎

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*.iml
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.idea
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target
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output.xml
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.classpath
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.project
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.settings
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.vscode

‎DEVELOPMENT.md‎

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# Development
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### Build & Test
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```
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mvn package -Dmaven.wagon.http.ssl.insecure=true -Dmaven.wagon.http.ssl.allowall=true
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java -jar target/is-database-up.jar \
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-j "jdbc:postgresql://localhost:5441/test" \
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-u postgres \
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-p s3cr3t \
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-s true \
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-w 10
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```
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Now in another terminal start dockerized postgres
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```
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docker run -i -t --rm -p 5441:5432 \
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-e POSTGRES_PASSWORD=s3cr3t \
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-e POSTGRES_USER=postgres \
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-e POSTGRES_DB=test \
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postgres:9.5 \
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postgres -c 'log_statement=all'
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```
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### Testcoverage
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[Run OpenClover](http://openclover.org/) with maven:
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```bash
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mvn clean clover:setup test clover:aggregate clover:clover
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```
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Now look into `target/site/clover/`

‎README.md‎

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# java-is-database-up
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Is database ready for connections
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----
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### Is this for me?
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You are starting maybe dockerized MySQL or PostgreSQL databases and they need some time
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until they are ready and accept connections?
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You want to busy wait for the database to accept connections?
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Then this is for you.
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----
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### Usage
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Simply download the jar file and use it to wait for a database to accept connections like so and wait max 10 minutes.
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Currently supported database are PostgreSQL and MySQL.
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```
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# INSTALL
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curl -L -o is-database-up.jar \
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https://github.com/codeclou/java-is-database-up/releases/download/1.0.0/is-database-up.jar
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# RUN
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java -jar is-database-up.jar \
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-j "jdbc:postgresql://myhostname/mydb" \
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-u admin \
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-p myS3cr3t \
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-s true \
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-w 10
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```
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You can specify `-v` to see more information printed out.
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----
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### License
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[MIT](https://github.com/codeclou/java-is-database-up/blob/master/LICENSE) © [Bernhard Grünewaldt](https://github.com/clouless)

‎pom.xml‎

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>io.codeclou</groupId>
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<artifactId>java-is-database-up</artifactId>
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<version>1.0.0</version>
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<organization>
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<name>codeclou.io</name>
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<url>https://codeclou.io/</url>
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</organization>
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<licenses>
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<license>
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<name>MIT</name>
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<url>https://github.com/codeclou/java-is-database-up/blob/master/LICENSE</url>
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</license>
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</licenses>
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<name>java-is-database-up</name>
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<description>java-is-database-up</description>
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<packaging>jar</packaging>
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<dependencies>
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<dependency>
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<groupId>commons-cli</groupId>
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<artifactId>commons-cli</artifactId>
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<version>1.4</version>
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</dependency>
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<dependency>
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<groupId>mysql</groupId>
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<artifactId>mysql-connector-java</artifactId>
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<version>8.0.15</version>
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<!-- needs to be added to src/assembly/src.xml -->
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</dependency>
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<dependency>
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<groupId>org.postgresql</groupId>
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<artifactId>postgresql</artifactId>
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<version>9.4-1200-jdbc41</version>
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<!-- needs to be added to src/assembly/src.xml -->
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</dependency>
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<dependency>
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<groupId>junit</groupId>
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<artifactId>junit</artifactId>
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<version>4.12</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>com.openpojo</groupId>
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<artifactId>openpojo</artifactId>
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<version>0.8.6</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.powermock</groupId>
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<artifactId>powermock-module-junit4</artifactId>
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<version>${powermock.version}</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.powermock</groupId>
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<artifactId>powermock-api-mockito</artifactId>
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<version>${powermock.version}</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.mockito</groupId>
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<artifactId>mockito-all</artifactId>
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<version>1.10.19</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.powermock</groupId>
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<artifactId>powermock-api-mockito-common</artifactId>
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<version>1.7.0</version>
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<scope>test</scope>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.openclover</groupId>
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<artifactId>clover-maven-plugin</artifactId>
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<version>4.2.0</version>
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</plugin>
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<plugin>
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<artifactId>maven-assembly-plugin</artifactId>
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<version>3.1.0</version>
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<configuration>
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<finalName>is-database-up</finalName>
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<archive>
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<manifest>
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<mainClass>io.codeclou.java.is.database.up.Readiness</mainClass>
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</manifest>
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</archive>
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<descriptorRefs>
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<descriptorRef>jar-with-dependencies</descriptorRef>
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</descriptorRefs>
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<appendAssemblyId>false</appendAssemblyId>
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</configuration>
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<executions>
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<execution>
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<id>make-assembly</id>
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<phase>package</phase>
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<goals>
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<goal>single</goal>
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</goals>
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</execution>
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</executions>
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</plugin>
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</plugins>
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</build>
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<properties>
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<powermock.version>1.7.0</powermock.version>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<maven.compiler.source>1.8</maven.compiler.source>
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<maven.compiler.target>1.8</maven.compiler.target>
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</properties>
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</project>

‎src/main/java/io/codeclou/java/is/database/up/Readiness.java‎

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package io.codeclou.java.is.database.up;
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public class Readiness {
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public static void main(String[] args) throws Exception {
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ReadinessChecker checker = new ReadinessChecker();
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checker.run(args);
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}
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}

‎src/main/java/io/codeclou/java/is/database/up/ReadinessChecker.java‎

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package io.codeclou.java.is.database.up;
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import org.apache.commons.cli.*;
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import java.sql.Connection;
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import java.sql.DriverManager;
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import java.util.Properties;
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public class ReadinessChecker {
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private CommandLineParser parser = new DefaultParser();
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private Options options = new Options();
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private Boolean hasCmdLineParameterErrors = false;
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protected void run(String[] args) throws Exception {
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//
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// Pull in drivers
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//
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Class.forName("org.postgresql.Driver");
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Class.forName("com.mysql.cj.jdbc.Driver");
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//
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// Options
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//
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options.addOption("j", "jdbc", true, "the jdbc url e.g.: jdbc:postgresql://localhost/test");
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options.addOption("u", "user", true, "the database username");
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options.addOption("p", "password", true, "the database password");
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options.addOption("s", "ssl", true, "use ssl true/false. default true.");
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options.addOption("w", "maxwait", true, "how long should we wait until we exit with error in minutes.");
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options.addOption("v", "verbose", false, "if specified a lot of info is printed.");
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CommandLine cmd = this.parser.parse(options, args);
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System.out.println("\033[35m+-------------------------+\033[0m");
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System.out.println("\033[35m| Java Is Database Up |\033[0m");
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System.out.println("\033[35m+-------------------------+\033[0m");
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if (!cmd.hasOption("jdbc")) {
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System.out.println("\033[31mError >> Please specify connection with -j\033[0m");
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hasCmdLineParameterErrors = true;
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}
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if (!cmd.hasOption("user")) {
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System.out.println("\033[31mError >> Please specify database user with -u\033[0m");
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hasCmdLineParameterErrors = true;
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}
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if (!cmd.hasOption("password")) {
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System.out.println("\033[31mError >> Please specify database password with -p\033[0m");
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hasCmdLineParameterErrors = true;
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}
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if (!cmd.hasOption("ssl")) {
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System.out.println("\033[31mError >> Please specify database connection should use ssl with -s\033[0m");
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hasCmdLineParameterErrors = true;
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}
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if (!cmd.hasOption("maxwait")) {
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System.out.println("\033[31mError >> Please specify maxwait in minutes with -w\033[0m");
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hasCmdLineParameterErrors = true;
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}
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if (!hasCmdLineParameterErrors) {
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//
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// CONNECTION PROPS
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//
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String url = cmd.getOptionValue("jdbc");
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Properties props = new Properties();
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props.setProperty("user", cmd.getOptionValue("user"));
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props.setProperty("password", cmd.getOptionValue("password"));
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props.setProperty("ssl", cmd.getOptionValue("ssl"));
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Integer maxWaitMinutes = Integer.parseInt(cmd.getOptionValue("maxwait"));
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System.out.println("\033[36mTrying >> to connect to db " + url + " and waiting for max " + maxWaitMinutes + "min. \033[0m");
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for (int i=0; i < maxWaitMinutes * 2; i++) {
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//
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// TRY CONNECTION
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//
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try {
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Connection conn = DriverManager.getConnection(url, props);
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System.out.println("\033[32mSuccess >> database is up\033[0m");
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System.exit(0);
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} catch (Exception e) {
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if (cmd.hasOption("verbose")) {
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System.out.println(" . " + e.getMessage());
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} else {
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System.out.println(" .");
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}
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Thread.sleep(30000); // sleep 30s
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}
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}
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//
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// FINALLY (after maxwait reached)
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//
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System.out.println("\033[31mError >> Could not connect to db. Max wait reached. Exit.\033[0m");
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System.exit(1);
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}
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}
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}

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