DatabaseManager (Cyclos 4.14.14 Scripting API Documentation)

java.lang.Object
- org.cyclos.bootstrap.DatabaseManager

```
@Component("databaseManager")
public class DatabaseManager
extends Object
```
Applies the checks / automatic upgrade on the cyclos database. This class cannot inject either the JpaTransactionManager or TransactionTemplate because it is used in the middle of the EntityManagerFactory creation, and the JpaTransactionManager requires the EntityManagerFactory to be ready.

Field Summary

Fields
Modifier and Type Field Description

static String UNLOCK_DATABASE
SQL command to manually unlock the database

Constructor Summary

Constructors
Constructor Description

DatabaseManager()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`doWithCyclosInstanceLock(Runnable action)`	Prevents 2 Cyclos instances (even in a cluster) to execute the given action concurrently
`void`	`initialize()`
`boolean`	`isDatabaseLocked()`	Returns whether some Cyclos instance is currently locking this database
`void`	`lockDatabase(String hostId)`	Locks the application
`void`	`manageDatabase(javax.persistence.EntityManagerFactory emf)`	Apply the database management checks
`void`	`prepareDatabaseLock()`	Makes sure that the database lock mechanism has the required database objects
`void`	`unlockDatabase()`	Updates the database to mark it as no Cyclos instance running

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - UNLOCK_DATABASE
```
public static final String UNLOCK_DATABASE
```
    SQL command to manually unlock the database
    
    See Also:
    
    Constant Field Values
- Constructor Detail
  - DatabaseManager
```
public DatabaseManager()
```
- Method Detail
  - doWithCyclosInstanceLock
```
public void doWithCyclosInstanceLock(Runnable action)
```
    Prevents 2 Cyclos instances (even in a cluster) to execute the given action concurrently
  - initialize
```
@PostConstruct
public void initialize()
```
  - isDatabaseLocked
```
public boolean isDatabaseLocked()
```
    Returns whether some Cyclos instance is currently locking this database
  - lockDatabase
```
public void lockDatabase(String hostId)
```
    Locks the application
  - manageDatabase
```
public void manageDatabase(javax.persistence.EntityManagerFactory emf)
                    throws SQLException
```
    Apply the database management checks
    
    Throws:
    
    SQLException
  - prepareDatabaseLock
```
public void prepareDatabaseLock()
```
    Makes sure that the database lock mechanism has the required database objects
  - unlockDatabase
```
public void unlockDatabase()
```
    Updates the database to mark it as no Cyclos instance running