Jhipster - 配置多個數據源

Question

我有 springBatch 應用程序，我在其中使用了多個數據源，我配置如下，這非常簡單。 它工作正常。

如何在 spring 中使用 2 個或更多數據庫？

現在我必須將它集成到 Jhipster 項目中。 我在 application.yml 中做了類似的配置。 我從 application.yml 中刪除了自動生成的數據源，並添加了類似於上面帖子的配置，並在 DataBaseConfiguration.java 中注入了主數據源，這是 Jhipster 生成的類。 使用此配置，我無法對來自 JHipster UI 的數據庫實體進行 CRUD 操作。 我沒有在日志中看到任何錯誤。

我不確定在 Jhipster 項目中配置多個數據源的正確/簡單方法是什么。 使用多個數據庫的示例示例將為我提供一個良好的開端。 我在這方面沒有找到太多資源。

以下是我為在 JHipster 中擁有多個數據源而進行的更改的代碼示例

# ===================================================================
# Spring Boot configuration for the "dev" profile.
#
# This configuration overrides the application.yml file.
#
# More information on profiles: http://www.jhipster.tech/profiles/
# More information on configuration properties: http://www.jhipster.tech/common-application-properties/
# ===================================================================

# ===================================================================
# Standard Spring Boot properties.
# Full reference is available at:
# http://docs.spring.io/spring-boot/docs/current/reference/html/common-application-properties.html
# ===================================================================

spring:
    profiles:
        active: dev
        include: swagger
    devtools:
        restart:
            enabled: true
        livereload:
            enabled: false # we use gulp + BrowserSync for livereload
    jackson:
        serialization.indent_output: true

    jpa:
        database-platform: org.hibernate.dialect.Oracle12cDialect
        database: ORACLE
        show-sql: true
        properties:
            hibernate.id.new_generator_mappings: true
            hibernate.cache.use_second_level_cache: false
            hibernate.cache.use_query_cache: false
            hibernate.generate_statistics: true
            hibernate.default_schema: ********x
    mail:
        host: localhost
        port: 25
        username:
        password:
    messages:
        cache-seconds: 1
    thymeleaf:
        cache: false

    batch:
        job:
          enabled: false

liquibase:
    contexts: dev

# ===================================================================
# To enable SSL, generate a certificate using:
# keytool -genkey -alias ********x-storetype PKCS12 -keyalg RSA -keysize 2048 -keystore keystore.p12 -validity 3650
#
# You can also use Let's Encrypt:
# https://maximilian-boehm.com/hp2121/Create-a-Java-Keystore-JKS-from-Let-s-Encrypt-Certificates.htm
#
# Then, modify the server.ssl properties so your "server" configuration looks like:
#
# server:
#    port: 8443
#    ssl:
#        key-store: keystore.p12
#        key-store-password: <your-password>
#        keyStoreType: PKCS12
#        keyAlias: ********x
# ===================================================================
server:
    port: 8080

# ===================================================================
# JHipster specific properties
#
# Full reference is available at: http://www.jhipster.tech/common-application-properties/
# ===================================================================

jhipster:
    http:
        version: V_1_1 # To use HTTP/2 you will need SSL support (see above the "server.ssl" configuration)
    # CORS is only enabled by default with the "dev" profile, so BrowserSync can access the API
    cors:
        allowed-origins: "*"
        allowed-methods: "*"
        allowed-headers: "*"
        exposed-headers: "Authorization"
        allow-credentials: true
        max-age: 1800
    security:
        authentication:
            jwt:
                secret: my-secret-token-to-change-in-production
                # Token is valid 24 hours
                token-validity-in-seconds: 86400
                token-validity-in-seconds-for-remember-me: 2592000
    mail: # specific JHipster mail property, for standard properties see MailProperties
        from: ********x@localhost
        base-url: http://127.0.0.1:8080
    metrics: # DropWizard Metrics configuration, used by MetricsConfiguration
        jmx.enabled: true
        graphite: # Use the "graphite" Maven profile to have the Graphite dependencies
            enabled: false
            host: localhost
            port: 2003
            prefix: ********x
        prometheus: # Use the "prometheus" Maven profile to have the Prometheus dependencies
            enabled: false
            endpoint: /prometheusMetrics
        logs: # Reports Dropwizard metrics in the logs
            enabled: false
            report-frequency: 60 # in seconds
    logging:
        logstash: # Forward logs to logstash over a socket, used by LoggingConfiguration
            enabled: false
            host: localhost
            port: 5000
            queue-size: 512

# ===================================================================
# Application specific properties
# Add your own application properties here, see the ApplicationProperties class
# to have type-safe configuration, like in the JHipsterProperties above
#
# More documentation is available at:
# http://www.jhipster.tech/common-application-properties/
# ===================================================================



datasource.********x.type: com.zaxxer.hikari.HikariDataSource
datasource.********x.url: "jdbc:oracle:thin:@********x"
datasource.********x.username: ********x
datasource.********x.password: ********x

datasource.********xy.type: com.zaxxer.hikari.HikariDataSource
datasource.********xy.url: "jdbc:oracle:thin:@yyyyyy"
datasource.********xy.username:********x
datasource.********xy.password: "********x"




package com.********x

import io.github.jhipster.config.JHipsterConstants;
import io.github.jhipster.config.liquibase.AsyncSpringLiquibase;

import liquibase.integration.spring.SpringLiquibase;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.autoconfigure.liquibase.LiquibaseProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.env.Environment;
import org.springframework.core.task.TaskExecutor;
import org.springframework.data.jpa.repository.config.EnableJpaAuditing;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.transaction.annotation.EnableTransactionManagement;

import javax.sql.DataSource;

@Configuration
@EnableJpaRepositories("com.********x")
@EnableJpaAuditing(auditorAwareRef = "springSecurityAuditorAware")
@EnableTransactionManagement
public class DatabaseConfiguration {

    private final Logger log = LoggerFactory.getLogger(DatabaseConfiguration.class);

    private final Environment env;

    public DatabaseConfiguration(Environment env) {
        this.env = env;
    }

    @Autowired
    @Qualifier("********x")
    private DataSource dataSource;

    @Bean
    public SpringLiquibase liquibase(@Qualifier("taskExecutor") TaskExecutor taskExecutor
            , LiquibaseProperties liquibaseProperties) {

        // Use liquibase.integration.spring.SpringLiquibase if you don't want Liquibase to start asynchronously
        SpringLiquibase liquibase = new AsyncSpringLiquibase(taskExecutor, env);
        liquibase.setDataSource(dataSource);
        liquibase.setChangeLog("classpath:config/liquibase/master.xml");
        liquibase.setContexts(liquibaseProperties.getContexts());
        liquibase.setDefaultSchema(liquibaseProperties.getDefaultSchema());
        liquibase.setDropFirst(liquibaseProperties.isDropFirst());
        if (env.acceptsProfiles(JHipsterConstants.SPRING_PROFILE_NO_LIQUIBASE)) {
            liquibase.setShouldRun(false);
        } else {
            liquibase.setShouldRun(liquibaseProperties.isEnabled());
            log.debug("Configuring Liquibase");
        }
        return liquibase;
    }
}

所以我在 DatabaseConfiguration.java 中注入了主數據源，並在需要時使用其他數據源。 這兩個數據源的創建類似於上面的帖子，就像 spring 建議的那樣。

Answer 1

這是我如何在 JHipster 項目中使用兩個數據源：

JHipster 生成的默認數據源屬性：

spring:
    datasource:
        type: com.zaxxer.hikari.HikariDataSource
        url: jdbc:h2:file:./target/h2db/db/mockpartenaire;DB_CLOSE_DELAY=-1
        username: mockpartenaire
        password:

JHistter 默認數據源的配置：

@Configuration
@EnableTransactionManagement
public class PrimaryDbConfig {

@Bean
@Primary
@ConfigurationProperties("spring.datasource")
public DataSourceProperties defaultDataSourceProperties() {
    return new DataSourceProperties();
}

@Bean
@Primary
@ConfigurationProperties("spring.datasource")
public DataSource defaultDataSource() {
    return defaultDataSourceProperties().initializeDataSourceBuilder().build();
}

@Bean(name = "entityManagerFactory")
@Primary
public LocalContainerEntityManagerFactoryBean customerEntityManagerFactory(
    EntityManagerFactoryBuilder builder) {
    return builder
        .dataSource(defaultDataSource())
        .packages(Input.class)
        .persistenceUnit("default")
        .build();
}

@Bean(name = "transactionManager")
@Primary
public JpaTransactionManager db2TransactionManager(@Qualifier("entityManagerFactory") final EntityManagerFactory emf) {
    JpaTransactionManager transactionManager = new JpaTransactionManager();
    transactionManager.setEntityManagerFactory(emf);
    return transactionManager;
}

}

第二個數據源屬性：

partner:
    datasource:
        type: com.zaxxer.hikari.HikariDataSource
        url: jdbc:postgresql://localhost:5432/partner
        username: partner
        password: partner
        driver-class-name: org.postgresql.Driver

第二個數據源配置：

@Configuration
@EnableTransactionManagement
@EntityScan(basePackages = "com.my.test.custom.domain")
@EnableJpaRepositories(transactionManagerRef = "partnerTransactionManager", entityManagerFactoryRef = "partnerEntityManagerFactory", basePackages = "com.my.test.custom.repository")
public class PartnerDbConfig {

    @Bean
    @ConfigurationProperties("partner.datasource")
    public DataSourceProperties partnerDataSourceProperties() {
        return new DataSourceProperties();
    }

    @Bean
    @ConfigurationProperties("partner.datasource")
    public DataSource partnerDataSource() {
        return partnerDataSourceProperties().initializeDataSourceBuilder().build();
    }

    @Bean(name = "partnerEntityManagerFactory")
    public LocalContainerEntityManagerFactoryBean customerEntityManagerFactory(
        EntityManagerFactoryBuilder builder) {
        Properties properties = new Properties();
        properties.setProperty("hibernate.dialect", "org.hibernate.dialect.PostgreSQLDialect");

        LocalContainerEntityManagerFactoryBean emf = builder
            .dataSource(partnerDataSource())
            .packages(TestPost.class)
            .persistenceUnit("partner")
            .build();
        emf.setJpaProperties(properties);
        return emf;
    }

    @Bean(name = "partnerTransactionManager")
    public JpaTransactionManager db2TransactionManager(@Qualifier("partnerEntityManagerFactory") final EntityManagerFactory emf) {
        JpaTransactionManager transactionManager = new JpaTransactionManager();
        transactionManager.setEntityManagerFactory(emf);
        return transactionManager;
    }
}

JHipster 配置的默認數據源將繼續工作它的實體。 對於使用第二個數據源的自定義實體，這里是存儲庫配置：

@SuppressWarnings("unused")
@Repository
@Transactional("partnerTransactionManager")
@PersistenceContext(name = "partnerEntityManagerFactory")
public interface TestPostRepository extends  JpaRepository<TestPost,Long>{
}

Answer 2

我發現@freemanpolys 的回答很好，但如果你想讓它與 postGres 一起工作，它需要一個額外的屬性。

將以下屬性添加到默認和輔助數據源：

autocommit: false