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# Client API: How to Create a Document Store

To create an instance of the `DocumentStore` you need to specify a list of URL addresses that point to RavenDB server nodes.

{WARNING:Important}
Do not open a `DocumentStore` using URL addresses that point to nodes outside your cluster.
{WARNING/}

{CODE:java document_store_creation@ClientApi\CreatingDocumentStore.java /}

This will instantiate a communication channel between your application and the local RavenDB server instance.

##Initialization

To be able to work on the `DocumentStore`, you will have to call the `initialize` method to get the fully initialized instance of `IDocumentStore`.

{NOTE:Conventions}

The conventions are frozen after `DocumentStore` initialization so they need to be set before `initialize` is called.

{NOTE/}

##Singleton

Because the document store is a heavyweight object, there should only be one instance created per application (singleton). The document store is a thread safe object and its typical
initialization looks like the following:

{CODE:java document_store_holder@ClientApi\CreatingDocumentStore.java /}

{NOTE If you use more than one instance of `DocumentStore` you should dispose it after use. /}

## Related Articles

### Session

- [What is a Session and How Does it Work](../client-api/session/what-is-a-session-and-how-does-it-work)

### Document Store

- [What is a Document Store](../client-api/what-is-a-document-store)
- [Setting up Default Database](../client-api/setting-up-default-database)
- [Setting up Authentication and Authorization](../client-api/setting-up-authentication-and-authorization)
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# Client API: How to Create a Document Store

To create an instance of the `DocumentStore` you need to specify a list of URL addresses that point to RavenDB server nodes.

{CODE:nodejs document_store_ctor@client-api\creatingDocumentStore.js /}

{WARNING:Important}
Do not open a `DocumentStore` using URL addresses that point to nodes outside your cluster.
{WARNING/}

{CODE:nodejs document_store_creation@client-api\creatingDocumentStore.js /}

The above snippet is going to instantiate a communication channel between your application and the local RavenDB server instance.

##Initialization

A `DocumentStore` instance must be initialized before use by calling the `.initialize()` method.

{NOTE:Conventions}

After `DocumentStore` initialization, the conventions are frozen - modification attempts are going to result with error. Conventions need to be set *before* `.initialize()` is called.

{NOTE/}

##Singleton

Because the document store is a heavyweight object, there should only be one instance created per application (a singleton - simple to achieve in Node.js by wrapping it in a module). Typical initialization of a document store looks as follows:

{CODE:nodejs document_store_holder@client-api\creatingDocumentStore.js /}

{NOTE If you use more than one instance of `DocumentStore`, you should dispose it after use by calling its `.dispose()` method. /}

## Related Articles

### Session

- [What is a Session and How Does it Work](../client-api/session/what-is-a-session-and-how-does-it-work)

### Document Store

- [What is a Document Store](../client-api/what-is-a-document-store)
- [Setting up Default Database](../client-api/setting-up-default-database)
- [Setting up Authentication and Authorization](../client-api/setting-up-authentication-and-authorization)
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package net.ravendb.ClientApi;

import net.ravendb.client.documents.DocumentStore;
import net.ravendb.client.documents.IDocumentStore;

public class CreatingDocumentStore {
public CreatingDocumentStore() {
//region document_store_creation
try (IDocumentStore store = new DocumentStore( new String[]{ "http://localhost:8080" }, "Northwind")) {
store.initialize();


}
//endregion
}



//region document_store_holder
public static class DocumentStoreHolder {

private static IDocumentStore store;

static {
store = new DocumentStore(new String[]{ "http://localhost:8080" }, "Northwind");
}

public static IDocumentStore getStore() {
return store;
}
}
//endregion
}
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import { DocumentStore } from "ravendb";

let urls, database, authOptions;

{
//region document_store_ctor
new DocumentStore(urls, [database], [authOptions]);
//endregion
}

{
//region document_store_creation
const store = new DocumentStore(["http://localhost:8080"], "Northwind");
store.initialize();
//endregion
}

//region document_store_holder
// documentStoreHolder.js
const store = new DocumentStore("http://localhost:8080", "Northwind");
store.initialize();
export { store as documentStore };
//endregion

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