@Override
public void open(ExecutionContext executionContext) throws ItemStreamException {
super.open(executionContext);
try {
doOpen();
} catch (Exception e) {
throw new ItemStreamException("Failed to initialize the reader", e);
}
if (!isSaveState()) {
return;
}
if (executionContext.containsKey(getExecutionContextKey(READ_COUNT_MAX))) {
maxItemCount = executionContext.getInt(getExecutionContextKey(READ_COUNT_MAX));
}
if (executionContext.containsKey(getExecutionContextKey(READ_COUNT))) {
int itemCount = executionContext.getInt(getExecutionContextKey(READ_COUNT));
if (itemCount < maxItemCount) {
try {
jumpToItem(itemCount);
} catch (Exception e) {
throw new ItemStreamException("Could not move to stored position on restart", e);
}
}
currentItemCount = itemCount;
}
}
@Override
public void close() throws ItemStreamException {
super.close();
currentItemCount = 0;
try {
doClose();
} catch (Exception e) {
throw new ItemStreamException("Error while closing item reader", e);
}
}
@Override
public void update(ExecutionContext executionContext) throws ItemStreamException {
super.update(executionContext);
if (saveState) {
Assert.notNull(executionContext, "ExecutionContext must not be null");
executionContext.putInt(getExecutionContextKey(READ_COUNT), currentItemCount);
if (maxItemCount < Integer.MAX_VALUE) {
executionContext.putInt(getExecutionContextKey(READ_COUNT_MAX), maxItemCount);
}
}
}