SystemService (marklogic-data-hub 5.8.0 API)

```
public interface SystemService
```
Provides a set of operations on the database server

Method Summary

All Methods Static Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method and Description
`java.io.Reader`	`createCustomRewriters()` Creates custom rewriter modules for the staging and job app servers
`void`	`finishHubDeployment()` Invokes the finishHubDeployment operation on the database server
`com.fasterxml.jackson.databind.JsonNode`	`getDataHubConfig()` Invokes the getDataHubConfig operation on the database server
`com.fasterxml.jackson.databind.JsonNode`	`getVersions()` Invokes the getVersions operation on the database server
`static SystemService`	`on(com.marklogic.client.DatabaseClient db)` Creates a SystemService object for executing operations on the database server.
`static SystemService`	`on(com.marklogic.client.DatabaseClient db, com.marklogic.client.io.marker.JSONWriteHandle serviceDeclaration)` Creates a SystemService object for executing operations on the database server.

- Method Detail
  - on
```
static SystemService on(com.marklogic.client.DatabaseClient db)
```
    Creates a SystemService object for executing operations on the database server. The DatabaseClientFactory class can create the DatabaseClient parameter. A single client object can be used for any number of requests and in multiple threads.
    
    Parameters:
    
    db - provides a client for communicating with the database server
    
    Returns:
    
    an object for executing database operations
  - on
```
static SystemService on(com.marklogic.client.DatabaseClient db,
                        com.marklogic.client.io.marker.JSONWriteHandle serviceDeclaration)
```
    Creates a SystemService object for executing operations on the database server. The DatabaseClientFactory class can create the DatabaseClient parameter. A single client object can be used for any number of requests and in multiple threads. The service declaration uses a custom implementation of the same service instead of the default implementation of the service by specifying an endpoint directory in the modules database with the implementation. A service.json file with the declaration can be read with FileHandle or a string serialization of the JSON declaration with StringHandle.
    
    Parameters:
    
    db - provides a client for communicating with the database server
    
    serviceDeclaration - substitutes a custom implementation of the service
    
    Returns:
    
    an object for executing database operations
  - getVersions
```
com.fasterxml.jackson.databind.JsonNode getVersions()
```
    Invokes the getVersions operation on the database server
    
    Returns:
    
    as output
  - createCustomRewriters
```
java.io.Reader createCustomRewriters()
```
    Creates custom rewriter modules for the staging and job app servers
    
    Returns:
    
    as output
  - finishHubDeployment
```
void finishHubDeployment()
```
    Invokes the finishHubDeployment operation on the database server
  - getDataHubConfig
```
com.fasterxml.jackson.databind.JsonNode getDataHubConfig()
```
    Invokes the getDataHubConfig operation on the database server
    
    Returns:
    
    as output

Interface SystemService

Method Summary

Method Detail

on

on

getVersions

createCustomRewriters

finishHubDeployment

getDataHubConfig