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vertx-pg-dal

Postgres database access layer, base on vertx-pg-client (3.8.0).

Features

  • async
  • simple
  • no reflect-code cost

usage

  • add dependency

    <dependency>
        <groupId>io.vertx</groupId>
        <artifactId>vertx-pg-client</artifactId>
        <version>${vertx.version}</version> <!-- [3.8.0, -->
    </dependency>
    
    <dependency>
        <groupId>org.pharosnet</groupId>
        <artifactId>vertx-pg-dal</artifactId>
        <version>1.5.8</version>
    </dependency>
  • update pom.xml

    <plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.8.0</version>
        <configuration>
            <source>11</source>
            <target>11</target>
            <encoding>UTF-8</encoding>
            <verbose>true</verbose>
            <generatedSourcesDirectory>src/main/generated</generatedSourcesDirectory><generatedTestSourcesDirectory>src/test/generated</generatedTestSourcesDirectory>
        </configuration>
        <executions>
            <execution>
                <id>default-compile</id>
                <configuration>
                    <annotationProcessors>
                        <annotationProcessor>io.vertx.codegen.CodeGenProcessor</annotationProcessor>
                        <annotationProcessor>org.pharosnet.vertx.pg.dal.gen.PgCodeGenProcessor</annotationProcessor>
                    </annotationProcessors>
                    <generatedSourcesDirectory>src/main/generated</generatedSourcesDirectory>
                    <compilerArgs>
                        <arg>-Acodegen.output=${project.basedir}/src/main</arg>
                    </compilerArgs>
                </configuration>
            </execution>
            <execution>
                <id>default-testCompile</id>
                <configuration>
                    <annotationProcessors>
                        <annotationProcessor>io.vertx.codegen.CodeGenProcessor</annotationProcessor>
                        <annotationProcessor>org.pharosnet.vertx.pg.dal.gen.PgCodeGenProcessor</annotationProcessor>
                    </annotationProcessors>
                    <generatedTestSourcesDirectory>src/test/generated</generatedTestSourcesDirectory>
                    <compilerArgs>
                        <arg>-Acodegen.output=${project.basedir}/src/test</arg>
                    </compilerArgs>
                </configuration>
            </execution>
        </executions>
    </plugin>
  • CREATE A TABLE ROW CLASS

    @Table(schema = "CDST", name = "USER")
    public class User extends AbstractRow {
    
        @Column(name = "ID", kind = ColumnKind.ID)
        private String id;
    
        @Column(name = "data")
        private String name;
    
    
        public String getId() {
            return id;
        }
    
        public void setId(String id) {
            this.id = id;
        }
    
        public String getName() {
            return name;
        }
    
        public void setName(String name) {
            this.name = name;
        }
    }
  • CREATE A DAL INTERFACE

    @Dal
    public interface UserDAL extends AbstractDAL {
    
        @Query("select * from \"cdst\".\"user\" where \"id\" = $1 or \"id\" = $2 offset $3 limit $4")
        void query01(
                @Arg({1, 2}) String id,
                @Arg({3})Integer offset,
                @Arg({4})Integer length,
                Handler<AsyncResult<Optional<Stream<User>>>> handler);
    
        @Query("select * from \"cdst\".\"user\" where \"id\" = $1 ")
        void query02(
                @Arg({1}) String id,
                @Arg({2})Integer offset,
                @Arg({3})Integer length,
                Handler<AsyncResult<Optional<User>>> handler);
     
        // support sql placeholder
        @Query("select * from \"cdst\".\"user\" where \"id\" = $1 and \"name\" in (%names) offset $2 limit $3")
        void query03(
                @Arg({1}) String id,
                @Arg(kind = ArgKind.PLACEHOLDER) List<Integer> names,
                @Arg({2})Integer offset,
                @Arg({3})Integer length,
                Handler<AsyncResult<Optional<Stream<User>>>> handler);
    
    }
  • Get dal from PostgresDALs.

// init postgres dal holder.
PostgresDALs.INIT(client);
// get UserDAL from PostgresDALs
UserDAL dal = PostgresDALs.get(UserDAL.class);
  • RUN MAVEN COMPILE, THEN IT WILL GENERATE DAL JAVA FILES.

  • HAPPY TO USE THEM.

THANKS

  • vertx-pg-client

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