LastModificationState (openbis_standard_technologies SNAPSHOT-r1677241701 API)

java.lang.Object
- ch.systemsx.cisd.openbis.generic.shared.basic.dto.LastModificationState

All Implemented Interfaces:

java.io.Serializable
```
public class LastModificationState
extends java.lang.Object
implements java.io.Serializable
```
Stores information about the time and DatabaseModificationKind of the last modification, separately for each kind of database object.
A DatabaseModificationKind has two bits of information:
- The kind of database object (e.g. Sample, Experiment etc. see DatabaseModificationKind.ObjectKind).
- The kind of operation either update or creation/deletion (see DatabaseModificationKind.OperationKind).
Instances of LastModificationState store for each combination of object kind and operation kind the time stamp of last invocation of a service method annotated with either DatabaseCreateOrDeleteModification or DatabaseUpdateModification.
The method getLastModificationTime(DatabaseModificationKind) allows to retrieve this time stamp.
The service method ICommonServer.getLastModificationState(String) provides an instance of this class with the latest time stamps. It can be used by a client to update views (see for example ch.systemsx .cisd.openbis.generic.client.web.client.application.framework.LastModificationStateUpdater).
Note, that only the kind of object not the actual type or even instance is stored. That means for example that the creation of a new sample will lead to an update of any sample detailed view in the Web GUI.
See Also:

Serialized Form

Constructor Summary

Constructors
Constructor Description

LastModificationState()
Creates a state marking all

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`long`	`getLastModificationTime(DatabaseModificationKind kind)`	To avoid expensive computation of the last modification time at the beginning (which would require browsing the whole database) at the beginning we assume that it's equal to the initialization time of the whole state.
`void`	`registerModification(DatabaseModificationKind kind, long currentTimestamp)`
`java.lang.String`	`toString()`

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

- Constructor Detail
  - LastModificationState
```
public LastModificationState()
```
    Creates a state marking all
- Method Detail
  - registerModification
```
public void registerModification(DatabaseModificationKind kind,
                                 long currentTimestamp)
```
  - getLastModificationTime
```
public long getLastModificationTime(DatabaseModificationKind kind)
```
    To avoid expensive computation of the last modification time at the beginning (which would require browsing the whole database) at the beginning we assume that it's equal to the initialization time of the whole state. We can do this since all the future modifications will happen after this moment.
    
    Returns:
    
    The last registered time of the specified kind of database modification.
  - toString
```
public java.lang.String toString()
```
    Overrides:
    
    toString in class java.lang.Object