ChainedReceiveCommands (Gerrit Review Plugin API Documentation)

java.lang.Object
- com.google.gerrit.server.git.ChainedReceiveCommands

All Implemented Interfaces:

RefCache
```
public class ChainedReceiveCommands
extends java.lang.Object
implements RefCache
```
Collection of ReceiveCommands that supports multiple updates per ref.
The underlying behavior of BatchRefUpdate is undefined (an implementations vary) when more than one command per ref is added. This class works around that limitation by allowing multiple updates per ref, as long as the previous new SHA-1 matches the next old SHA-1.

Constructor Summary

Constructors
Constructor and Description

ChainedReceiveCommands(RepoRefCache refCache)

ChainedReceiveCommands(org.eclipse.jgit.lib.Repository repo)

Constructors
Constructor and Description
`ChainedReceiveCommands(RepoRefCache refCache)`
`ChainedReceiveCommands(org.eclipse.jgit.lib.Repository repo)`

Method Summary

Methods
Modifier and Type	Method and Description
`void`	`add(org.eclipse.jgit.transport.ReceiveCommand cmd)` Add a command.
`void`	`addTo(org.eclipse.jgit.lib.BatchRefUpdate bru)` Add commands from this instance to a native JGit batch update.
`com.google.common.base.Optional<org.eclipse.jgit.lib.ObjectId>`	`get(java.lang.String refName)` Get the latest value of a ref according to this sequence of commands.
`java.util.Map<java.lang.String,org.eclipse.jgit.transport.ReceiveCommand>`	`getCommands()`
`RepoRefCache`	`getRepoRefCache()`
`boolean`	`isEmpty()`

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

- Constructor Detail
  - ChainedReceiveCommands
```
public ChainedReceiveCommands(org.eclipse.jgit.lib.Repository repo)
```
  - ChainedReceiveCommands
```
public ChainedReceiveCommands(RepoRefCache refCache)
```
- Method Detail
  - getRepoRefCache
```
public RepoRefCache getRepoRefCache()
```
  - isEmpty
```
public boolean isEmpty()
```
  - add
```
public void add(org.eclipse.jgit.transport.ReceiveCommand cmd)
```
    Add a command.
    
    Parameters:
    cmd - command to add. If a command has been previously added for the same ref, the new SHA-1 of the most recent previous command must match the old SHA-1 of this command.
  - get
```
public com.google.common.base.Optional<org.eclipse.jgit.lib.ObjectId> get(java.lang.String refName)
                                                                   throws java.io.IOException
```
    Get the latest value of a ref according to this sequence of commands.
    After the value for a ref is read from the repo once, it is cached as in RepoRefCache.
    
    Specified by:
    
    get in interface RefCache
    
    Parameters:
    refName - name of the ref.
    
    Returns:
    value of the ref; absent if the ref does not exist in the repo. Never null, and never present with a value of ObjectId.zeroId().
    
    Throws:
    
    java.io.IOException
    See Also:
    RefCache.get(String)
  - addTo
```
public void addTo(org.eclipse.jgit.lib.BatchRefUpdate bru)
```
    Add commands from this instance to a native JGit batch update.
    Exactly one command per ref will be added to the update. The old SHA-1 will be the old SHA-1 of the first command added to this instance for that ref; the new SHA-1 will be the new SHA-1 of the last command.
    
    Parameters:
    bru - batch update
  - getCommands
```
public java.util.Map<java.lang.String,org.eclipse.jgit.transport.ReceiveCommand> getCommands()
```
    Returns:
    an unmodifiable view of commands.

Class ChainedReceiveCommands

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

ChainedReceiveCommands

ChainedReceiveCommands

Method Detail

getRepoRefCache

isEmpty

add

get

addTo

getCommands