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Reset persisted data if there is a serialisation problem #319

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This commit is contained in:
Manfred Karrer 2014-12-08 19:00:20 +01:00
parent 39524719ee
commit 25cac42700
1 changed files with 22 additions and 13 deletions
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29
src/main/java/io/bitsquare/persistence/Persistence.java
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@ -60,6 +60,7 @@ public class Persistence {
private final File dir; private final File dir;
private final String prefix; private final String prefix;
private final File storageFile; private final File storageFile;
private int resetCounter = 0;
/////////////////////////////////////////////////////////////////////////////////////////// ///////////////////////////////////////////////////////////////////////////////////////////
// Constructor // Constructor
@ -83,17 +84,10 @@ public class Persistence {
lock.lock(); lock.lock();
final Map<String, Serializable> map = readRootMap(); final Map<String, Serializable> map = readRootMap();
if (map == null) { if (map == null)
lock.lock();
try {
saveObjectToFile((Serializable) rootMap); saveObjectToFile((Serializable) rootMap);
} finally { else
lock.unlock();
}
}
else {
rootMap = map; rootMap = map;
}
} finally { } finally {
lock.unlock(); lock.unlock();
} }
@ -213,11 +207,26 @@ public class Persistence {
log.trace("File not found is ok for the first execute."); log.trace("File not found is ok for the first execute.");
return null; return null;
} catch (ClassNotFoundException | IOException e2) { } catch (ClassNotFoundException | IOException e2) {
log.warn("Could not read rootMap. " + e2);
// If there are problems with incompatible versions, we reset the persisted data
// TODO We need a clean solution when we use another persistence solution
rootMap = new HashMap<>();
saveObjectToFile((Serializable) rootMap);
resetCounter++;
// We only try that once, if it fails repeatedly we
if (resetCounter == 1) {
log.warn("We reset the persisted data and try again to read the root map.");
return readRootMap();
}
else {
e2.printStackTrace(); e2.printStackTrace();
log.error("Could not read rootMap. " + e2); log.error("We tried already to reset the persisted data, but we get an error again, so we give up.");
return null; return null;
} }
} }
}
private void saveObjectToFile(Serializable serializable) { private void saveObjectToFile(Serializable serializable) {
File tempFile = null; File tempFile = null;