1.获取Nacos源码,下载源码可以查看官网。这里用Nacos2.2.3举例
2.在父pom.xml添加dm8依赖
<dameng.version>8.1.3.12</dameng.version>
<dependency>
<groupId>org.apache.derby</groupId>
<artifactId>derby</artifactId>
<version>${
derby.version}</version>
</dependency>
- 在nacos-config项目的pom文件中添加
<dependency>
<groupId>com.dameng</groupId>
<artifactId>DmJdbcDriver18</artifactId>
</dependency>
- 变更ExternalDataSourceProperties类
# 在ExternalDataSourceProperties类中添加jdbcDriverName属性
private String jdbcDriverName;
public String getJdbcDriverName() {
return jdbcDriverName;
}
public void setJdbcDriverName(String jdbcDriverName) {
this.jdbcDriverName = jdbcDriverName;
}
# 修改ExternalDataSourceProperties类中的build方法
List<HikariDataSource> build(Environment environment, Callback<HikariDataSource> callback) {
List<HikariDataSource> dataSources = new ArrayList<>();
Binder.get(environment).bind("db", Bindable.ofInstance(this));
Preconditions.checkArgument(Objects.nonNull(num), "db.num is null");
Preconditions.checkArgument(CollectionUtils.isNotEmpty(user), "db.user or db.user.[index] is null");
Preconditions.checkArgument(CollectionUtils.isNotEmpty(password), "db.password or db.password.[index] is null");
for (int index = 0; index < num; index++) {
int currentSize = index + 1;
Preconditions.checkArgument(url.size() >= currentSize, "db.url.%s is null", index);
DataSourcePoolProperties poolProperties = DataSourcePoolProperties.build(environment);
if (StringUtils.isEmpty(poolProperties.getDataSource().getDriverClassName())) {
if (StringUtils.isNotEmpty(jdbcDriverName)) {
// 增加其他数据库驱动的支持
poolProperties.setDriverClassName(jdbcDriverName);
} else {
//默认使用mysql驱动
poolProperties.setDriverClassName(JDBC_DRIVER_NAME);
}
}
poolProperties.setJdbcUrl(url.get(index).trim());
poolProperties.setUsername(getOrDefault(user, index, user.get(0)).trim());
poolProperties.setPassword(getOrDefault(password, index, password.get(0)).trim());
HikariDataSource ds = poolProperties.getDataSource();
if (StringUtils.isEmpty(ds.getConnectionTestQuery())) {
ds.setConnectionTestQuery(TEST_QUERY);
}
dataSources.add(ds);
callback.accept(ds);
}
Preconditions.checkArgument(CollectionUtils.isNotEmpty(dataSources), "no datasource available");
return dataSources;
}
- 修改ExternalConfigInfoPersistServiceImpl类将DuplicateKeyException改为DataIntegrityViolationException
6. 修改nacos-datasource-plugin工程
在DataSourceConstant中添加public static final String DM = "dm";
- 在nacos-datasource-plugin下impl实现类创建dm包并将mysql下的所有类复制到dm下,并修改里面的数据源参数
- 在nacos-datasource-plugin下resource–>META-INF–>services–>com.alibaba.nacos.plugin.datasource.mapper.Mapper添加参数
com.alibaba.nacos.plugin.datasource.impl.dm.ConfigInfoAggrMapperByDm
com.alibaba.nacos.plugin.datasource.impl.dm.ConfigInfoBetaMapperByDm
com.alibaba.nacos.plugin.datasource.impl.dm.ConfigInfoMapperByDm
com.alibaba.nacos.plugin