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WalletAppKit: make sure downloadListener is never null

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This simplifies the `if (blockingStartup)` and its `else` block. This change makes way
for further simplification.
This commit is contained in:
Sean Gilligan 2022-07-27 13:30:11 -07:00 • committed by Andreas Schildbach
parent 4bd79448ee
commit ff674ea605
1 changed files with 5 additions and 7 deletions
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12
core/src/main/java/org/bitcoinj/kits/WalletAppKit.java
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@ -100,7 +100,7 @@ public class WalletAppKit extends AbstractIdleService {
protected boolean useAutoSave = true;
protected PeerAddress[] peerAddresses;
protected DownloadProgressTracker downloadListener;
protected DownloadProgressTracker downloadListener = new DownloadProgressTracker();
protected boolean autoStop = true;
protected InputStream checkpoints;
protected boolean blockingStartup = true;
@ -179,6 +179,7 @@ public class WalletAppKit extends AbstractIdleService {
* too, due to some missing implementation code.
*/
public WalletAppKit setDownloadListener(DownloadProgressTracker listener) {
checkNotNull(listener);
this.downloadListener = listener;
return this;
}
@ -384,15 +385,12 @@ public class WalletAppKit extends AbstractIdleService {
// Make sure we shut down cleanly.
installShutdownHook();
// TODO: Be able to use the provided download listener when doing a blocking startup.
final DownloadProgressTracker listener = new DownloadProgressTracker();
vPeerGroup.startBlockChainDownload(listener);
listener.await();
vPeerGroup.startBlockChainDownload(downloadListener);
downloadListener.await();
} else {
vPeerGroup.startAsync().whenComplete((result, t) -> {
if (t == null) {
final DownloadProgressTracker l = downloadListener == null ? new DownloadProgressTracker() : downloadListener;
vPeerGroup.startBlockChainDownload(l);
vPeerGroup.startBlockChainDownload(downloadListener);
} else {
throw new RuntimeException(t);
}