Dropwizard bundle which helps to achieve multi-tenancy in dropwizard application
Configuration:
Add the database configuration for each tenant, database configuration accepts all the properties which dropwizard
DatabaseConfiguration object accepts - .
Shown in below example.
multiTenantDataSourceConfiguration:
tenantHeaderName: X_TENANT_ID
enforceTenantHeaderInAllRequests: true
databaseConfigurations:
tenant_1:
driverClass: com.mysql.jdbc.Driver
user: root
password:
url: jdbc:mysql://db_server_1:port/database_tenant_1
tenant_2:
driverClass: com.mysql.jdbc.Driver
user: root
password:
url: jdbc:mysql://db_server_2:port/databse_tenant_2Above configuration accepts, tenantHeaderName - which is been used the resolve the tenant for each request and initializes the necessary things to connect to defined datasource.
and enforceTenantHeaderInAllRequests defines - whether headerName is optional or mandatory in all requests. If value is true and tenantHeaderName is missing, then request will be rejected, and 400 response will be sent with the message Invalid Tenant Nil
Adding the tenant-resolver bundle to the Application:
During the initialization of dropwizard application, add tenant-resolver bundle, as mentioned below -
@Override
public void initialize(Bootstrap<DropwizardServiceConfiguration> bootstrap) {
bootstrap.addBundle(new MultiTenantResolverBundle<DropwizardServiceConfiguration>() {
@Override
protected MultiTenantDataSourceConfiguration getMultiTenantDataSourceConfiguration(
DropwizardServiceConfiguration configuration) {
return configuration.getMultiTenantDataSourceConfiguration();
}
@Override
protected List<String> getPackagesToScan() {
List<String> packagesToScan = new LinkedList<String>();
packagesToScan.add("com.sample.service.model");
packagesToScan.add("com.sample.service.extensions");
return packagesToScan;
}
});and define the Configuration in Service Configuration like -
@Valid
private MultiTenantDataSourceConfiguration multiTenantDataSourceConfiguration =
new MultiTenantDataSourceConfiguration();and define the provider for the same like -
@Provides
@Singleton
MultiTenantDataSourceConfiguration providesMultiTenantDsConfigurations(
Provider<DropwizardServiceConfiguration> provider) {
return provider.get().getMultiTenantDataSourceConfiguration();
}How to use
If you want to access the entityManager, where this snippet is getting ececuted in the scope of request and request has tenantHeader present -
TenantResolver.getEntityManager()and if you explicitly want to use the specific tenant's entity manager -
TenantResolver.getEntityManager(tenantName)
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