DeployableChain (Apache Axis2)

java.lang.Object
- org.apache.axis2.engine.DeployableChain<T>

```
public class DeployableChain<T>
extends Object
```
A DeployableChain is a container which manages dependencies between Deployables. You deploy() them in, then call rebuild() which will set up a chain, correctly ordered according to the constraints in the Deployables.

Constructor Summary

Constructors
Constructor Description

DeployableChain()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`addRelationship(String before, String after)`	Adds a before/after relationship to the active constraints.
`void`	`deploy(Deployable deployable)`	Deploy a Deployable into this chain.
`List<T>`	`getChain()`	Get the chain - once rebuild() has been called this will be the chain of target objects.
`void`	`rebuild()`	Taking into account all the active constraints, order the list.

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

- Constructor Detail
  - DeployableChain
```
public DeployableChain()
```
- Method Detail
  - deploy
```
public void deploy(Deployable deployable)
            throws Exception
```
    Deploy a Deployable into this chain. Note that this does NOT order yet. The idea is to deploy everything first, then call rebuild() to generate the fully ordered chain. This method will validate the Deployable, including confirming that it's compatible with any previously deployed item of the same name.
    
    Parameters:
    
    deployable - Deployable to deploy.
    
    Throws:
    
    Exception - if there is a deployment error.
  - rebuild
```
public void rebuild()
             throws Exception
```
    Taking into account all the active constraints, order the list. This blows away the old order. Could improve this slightly with a "dirty" flag.
    
    Throws:
    
    Exception - if there's an ordering conflict
  - addRelationship
```
public void addRelationship(String before,
                            String after)
```
    Adds a before/after relationship to the active constraints.
    
    Parameters:
    
    before - name of the Deployable that must come first
    
    after - name of the Deployable that must come later
  - getChain
```
public List<T> getChain()
```
    Get the chain - once rebuild() has been called this will be the chain of target objects.
    
    Returns:
    
    a List of target objects in the correct order