Invocation (PL/Java backend Java code 1.6.4)

java.lang.Object
- org.postgresql.pljava.jdbc.Invocation

```
public class Invocation
extends Object
```
One invocation, from PostgreSQL, of functionality implemented using PL/Java.
This class is the Java counterpart of the struct Invocation_ in the C code, but while there is a new stack-allocated C structure on every entry from PG to PL/Java, no instance of this class is created unless requested (with current(); once requested, a reference to it is saved in the C struct for the duration of the invocation.
One further piece of magic applies to set-returning functions. Under the value-per-call protocol, there is technically a new entry into PL/Java, and a new C Invocation_ struct, for every row to be returned, but that low-level complication is hidden at this level: a single instance of this class, if once requested, will be remembered throughout the value-per-call sequence of calls.

Author:

Thomas Hallgren

- Method Summary
  
  Modifier and Type Method Description
  
  static Invocation current()
  
  int getNestingLevel()
  
  void onExit(boolean withError)
  Called from the backend when the invokation exits.
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - getNestingLevel
```
public int getNestingLevel()
```
    Returns:
    
    The nesting level of this invocation
  - onExit
```
public void onExit(boolean withError)
            throws SQLException
```
    Called from the backend when the invokation exits. Should not be invoked any other way.
    
    Throws:
    
    SQLException
  - current
```
public static Invocation current()
```
    Returns:
    
    The current invocation