ErrorMessageCache (Egeria Connector for XTDB 3.9 API)

java.lang.Object
- org.odpi.egeria.connectors.juxt.xtdb.cache.ErrorMessageCache

```
public class ErrorMessageCache
extends Object
```
A thread-safe way of capturing errors for a given transaction for error-handling purposes across threads. (Basically so we can still throw meaningful errors back to API calls even though the back-end processing happens in a different thread, asynchronously, from the API call itself.)

Constructor Summary

Constructors
Constructor Description

ErrorMessageCache()

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static Exception`	`add(Long txId, Exception error)`	Add an error for a given transaction.
`static Exception`	`get(Long txId)`	Retrieve any error for the given transaction.

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

- Constructor Detail
  - ErrorMessageCache
```
public ErrorMessageCache()
```
- Method Detail
  - add
```
public static Exception add(Long txId,
                            Exception error)
```
    Add an error for a given transaction.
    
    Parameters:
    
    txId - transaction for which to add the error
    
    error - error to record
    
    Returns:
    
    Exception error that was added
  - get
```
public static Exception get(Long txId)
```
    Retrieve any error for the given transaction.
    
    Parameters:
    
    txId - transaction for which to retrieve error
    
    Returns:
    
    Exception if there was any error, or null if there was no error