AWS SDK for JavaScript DatabaseMigrationService Client for Node.js, Browser and React Native.
Database Migration Service
Database Migration Service (DMS) can migrate your data to and from the most
widely used commercial and open-source databases such as Oracle, PostgreSQL, Microsoft SQL
Server, Amazon Redshift, MariaDB, Amazon Aurora, MySQL, and SAP Adaptive Server Enterprise
(ASE). The service supports homogeneous migrations such as Oracle to Oracle, as well as
heterogeneous migrations between different database platforms, such as Oracle to MySQL or
SQL Server to PostgreSQL.
The AWS SDK is modulized by clients and commands.
To send a request, you only need to import the DatabaseMigrationServiceClient and
the commands you need, for example ListTagsForResourceCommand:
Initiate client with configuration (e.g. credentials, region).
Initiate command with input parameters.
Call send operation on client with command object as input.
If you are using a custom http handler, you may call destroy() to close open connections.
// a client can be shared by different commands.const client =newDatabaseMigrationServiceClient({region:"REGION"});const params ={/** input parameters */};const command =newListTagsForResourceCommand(params);
Async/await
We recommend using await
operator to wait for the promise returned by send operation as follows:
// async/await.try{const data =await client.send(command);// process data.}catch(error){// error handling.}finally{// finally.}
Async-await is clean, concise, intuitive, easy to debug and has better error handling
as compared to using Promise chains or callbacks.
client.send(command).then((data)=>{// process data.},(error)=>{// error handling.});
Promises can also be called using .catch() and .finally() as follows:
client
.send(command).then((data)=>{// process data.}).catch((error)=>{// error handling.}).finally(()=>{// finally.});
Callbacks
We do not recommend using callbacks because of callback hell,
but they are supported by the send operation.
// callbacks.
client.send(command,(err, data)=>{// process err and data.});
v2 compatible style
The client can also send requests using v2 compatible style.
However, it results in a bigger bundle size and may be dropped in next major version. More details in the blog post
on modular packages in AWS SDK for JavaScript
import*asAWSfrom"@aws-sdk/client-database-migration-service";const client =newAWS.DatabaseMigrationService({ region:"REGION"});// async/await.try{const data =await client.listTagsForResource(params);// process data.}catch(error){// error handling.}// Promises.
client
.listTagsForResource(params).then((data)=>{// process data.}).catch((error)=>{// error handling.});// callbacks.
client.listTagsForResource(params,(err, data)=>{// process err and data.});
Troubleshooting
When the service returns an exception, the error will include the exception information,
as well as response metadata (e.g. request id).
try{const data =await client.send(command);// process data.}catch(error){const{ requestId, cfId, extendedRequestId }= error.$metadata;
console.log({ requestId, cfId, extendedRequestId });/**
* The keys within exceptions are also parsed.
* You can access them by specifying exception names:
* if (error.name === 'SomeServiceException') {
* const value = error.specialKeyInException;
* }
*/}
Getting Help
Please use these community resources for getting help.
We use the GitHub issues for tracking bugs and feature requests, but have limited bandwidth to address them.
If it turns out that you may have found a bug, please open an issue.
To test your universal JavaScript code in Node.js, browser and react-native environments,
visit our code samples repo.
Contributing
This client code is generated automatically. Any modifications will be overwritten the next time the @aws-sdk/client-database-migration-service package is updated.
To contribute to client you can check our generate clients scripts.
