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Adding controls on ProgressBar that might avoid sudden NPE with downloading net decks.

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I am still not sure how to reproduce the issue, but I do sometimes get a NPE on progress bar (directly raised by Java Swing, tbh) when downloading certain net decks.
I have the feeling there might be some sort of concurrency issue//race condition so just in case, any update to the progress bar is now surrounded by a check that's not null.
This commit is contained in:
leriomaggio
2021-07-29 12:14:55 +01:00
parent e382fd31ef
commit 556894296f
1 changed files with 30 additions and 27 deletions
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57
forge-gui/src/main/java/forge/gui/download/GuiDownloadZipService.java
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@@ -1,12 +1,13 @@
package forge.gui.download;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import com.esotericsoftware.minlog.Log;
import com.google.common.io.Files;
import forge.gui.FThreads;
import forge.gui.GuiBase;
import forge.gui.interfaces.IProgressBar;
import forge.util.FileUtil;
import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;
import java.nio.charset.Charset;
@@ -16,14 +17,6 @@ import java.util.Map;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import com.esotericsoftware.minlog.Log;
import com.google.common.io.Files;
import forge.gui.FThreads;
import forge.gui.GuiBase;
import forge.gui.interfaces.IProgressBar;
import forge.util.FileUtil;
public class GuiDownloadZipService extends GuiDownloadService {
private final String name, desc, sourceUrl, destFolder, deleteFolder;
private int filesExtracted;
@@ -66,7 +59,8 @@ public class GuiDownloadZipService extends GuiDownloadService {
FThreads.invokeInEdtNowOrLater(new Runnable() {
@Override
public void run() {
progressBar.setDescription(filesExtracted + " " + desc + " extracted");
if (progressBar != null)
progressBar.setDescription(filesExtracted + " " + desc + " extracted");
finish();
}
});
@@ -85,6 +79,8 @@ public class GuiDownloadZipService extends GuiDownloadService {
public String download(final String filename) {
GuiBase.getInterface().preventSystemSleep(true); //prevent system from going into sleep mode while downloading
if (progressBar == null)
return "";
progressBar.reset();
progressBar.setPercentMode(true);
progressBar.setDescription("Downloading " + desc);
@@ -128,7 +124,8 @@ public class GuiDownloadZipService extends GuiDownloadService {
if (cancel) { break; }
total += count;
progressBar.setValue((int)(100 * total / contentLength));
if (progressBar != null)
progressBar.setValue((int)(100 * total / contentLength));
output.write(data, 0, count);
}
@@ -161,8 +158,10 @@ public class GuiDownloadZipService extends GuiDownloadService {
final File deleteDir = new File(deleteFolder);
if (deleteDir.exists()) {
//attempt to delete previous res directory if to be rebuilt
progressBar.reset();
progressBar.setDescription("Deleting old " + desc + "...");
if (progressBar != null) {
progressBar.reset();
progressBar.setDescription("Deleting old " + desc + "...");
}
if (deleteFolder.equals(destFolder)) { //move zip file to prevent deleting it
final String oldZipFilename = zipFilename;
zipFilename = deleteDir.getParentFile().getAbsolutePath() + File.separator + "temp.zip";
@@ -181,11 +180,12 @@ public class GuiDownloadZipService extends GuiDownloadService {
}
final Enumeration<? extends ZipEntry> entries = zipFile.entries();
progressBar.reset();
progressBar.setPercentMode(true);
progressBar.setDescription("Extracting " + desc);
progressBar.setMaximum(zipFile.size());
if (progressBar != null) {
progressBar.reset();
progressBar.setPercentMode(true);
progressBar.setDescription("Extracting " + desc);
progressBar.setMaximum(zipFile.size());
}
FileUtil.ensureDirectoryExists(destFolder);
int count = 0;
@@ -199,15 +199,18 @@ public class GuiDownloadZipService extends GuiDownloadService {
final String path = destFolder + File.separator + entry.getName();
if (entry.isDirectory()) {
new File(path).mkdir();
progressBar.setValue(++count);
if (progressBar != null)
progressBar.setValue(++count);
continue;
}
copyInputStream(zipFile.getInputStream(entry), path);
progressBar.setValue(++count);
if (progressBar != null)
progressBar.setValue(++count);
filesExtracted++;
}
catch (final Exception e) { //don't quit out completely if an entry is not UTF-8
progressBar.setValue(++count);
if (progressBar != null)
progressBar.setValue(++count);
failedCount++;
}
}