add plugin-wide config; enable CoW through config file

3 files changed, 77 insertions, 7 deletions

diff --git a/src/main/java/com/keuin/kbackupfabric/KBPluginEvents.java b/src/main/java/com/keuin/kbackupfabric/KBPluginEvents.java
index 362abb8..8b55d1e 100644
--- a/src/main/java/com/keuin/kbackupfabric/KBPluginEvents.java
+++ b/src/main/java/com/keuin/kbackupfabric/KBPluginEvents.java
@@ -2,6 +2,7 @@ package com.keuin.kbackupfabric;
 
 import com.keuin.kbackupfabric.backup.BackupFilesystemUtil;
 import com.keuin.kbackupfabric.backup.suggestion.BackupNameSuggestionProvider;
+import com.keuin.kbackupfabric.config.KBackupConfig;
 import com.keuin.kbackupfabric.event.OnPlayerConnect;
 import com.keuin.kbackupfabric.metadata.BackupMetadata;
 import com.keuin.kbackupfabric.metadata.MetadataHolder;
@@ -29,10 +30,17 @@ import static org.apache.commons.io.FileUtils.forceDelete;
 public final class KBPluginEvents implements ModInitializer {
 
     //private static final Logger LOGGER = LogManager.getLogger();
-
     @Override
     public void onInitialize() {
-        System.out.println("Binding events and commands ...");
+        PrintUtil.info("Reading config...");
+        try {
+            KBackupConfig.load();
+        } catch (IOException e) {
+            PrintUtil.error("Failed to read config file, using default values: " + e + e.getMessage());
+        }
+        boolean incCow = KBackupConfig.getInstance().getIncbakCow();
+        PrintUtil.info("Incremental backup CoW: " + (incCow ? "enabled" : "disabled"));
+        PrintUtil.info("Binding events and commands...");
         CommandRegistrationCallback.EVENT.register(KBCommandsRegister::registerCommands);
         OnPlayerConnect.ON_PLAYER_CONNECT.register((connection, player)
                 -> NotificationManager.INSTANCE.notifyPlayer(DistinctNotifiable.fromServerPlayerEntity(player)));
diff --git a/src/main/java/com/keuin/kbackupfabric/backup/incremental/manager/IncrementalBackupStorageManager.java b/src/main/java/com/keuin/kbackupfabric/backup/incremental/manager/IncrementalBackupStorageManager.java
index a680db7..53143f8 100644
--- a/src/main/java/com/keuin/kbackupfabric/backup/incremental/manager/IncrementalBackupStorageManager.java
+++ b/src/main/java/com/keuin/kbackupfabric/backup/incremental/manager/IncrementalBackupStorageManager.java
@@ -4,6 +4,7 @@ import com.keuin.kbackupfabric.backup.incremental.ObjectCollection2;
 import com.keuin.kbackupfabric.backup.incremental.ObjectCollectionIterator;
 import com.keuin.kbackupfabric.backup.incremental.ObjectElement;
 import com.keuin.kbackupfabric.backup.incremental.identifier.ObjectIdentifier;
+import com.keuin.kbackupfabric.config.KBackupConfig;
 import com.keuin.kbackupfabric.util.FilesystemUtil;
 import com.keuin.kbackupfabric.util.PrintUtil;
 import com.keuin.kbackupfabric.util.cow.FileCopier;
@@ -29,14 +30,19 @@ public class IncrementalBackupStorageManager {
     private final Logger logger = Logger.getLogger(IncrementalBackupStorageManager.class.getName());
     private final Path backupStorageBase;
     private final Logger LOGGER = Logger.getLogger(IncrementalBackupStorageManager.class.getName());
-    private FileCopier copier = null;
+    private FileCopier copier;
 
     public IncrementalBackupStorageManager(Path backupStorageBase) {
         this.backupStorageBase = backupStorageBase;
-        try {
-            this.copier = FileCowCopier.getInstance();
-        } catch (Exception | UnsatisfiedLinkError ex) {
-            PrintUtil.error("Failed to initialize kbackup-cow: " + ex + ex.getMessage());
+        if (KBackupConfig.getInstance().getIncbakCow()) {
+            // try to use cow copier, if failed, fallback to normal copier
+            try {
+                this.copier = FileCowCopier.getInstance();
+            } catch (Exception | UnsatisfiedLinkError ex) {
+                PrintUtil.error("Failed to initialize kbackup-cow: " + ex + ex.getMessage());
+                this.copier = new FileEagerCopier();
+            }
+        } else {
             this.copier = new FileEagerCopier();
         }
         if (this.copier.isCow()) {
diff --git a/src/main/java/com/keuin/kbackupfabric/config/KBackupConfig.java b/src/main/java/com/keuin/kbackupfabric/config/KBackupConfig.java
new file mode 100644
index 0000000..8ece8d2
--- /dev/null
+++ b/src/main/java/com/keuin/kbackupfabric/config/KBackupConfig.java
@@ -0,0 +1,56 @@
+package com.keuin.kbackupfabric.config;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.ObjectWriter;
+import com.keuin.kbackupfabric.util.PrintUtil;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+
+public class KBackupConfig {
+
+    private static KBackupConfig instance = getDefault();
+    private static final String CONFIG_FILE = "kbackup.json";
+
+    @JsonProperty("incbak_cow")
+    private Boolean incbakCow;
+
+    public static KBackupConfig getInstance() {
+        return instance;
+    }
+
+    private static KBackupConfig getDefault() {
+        return new KBackupConfig(false);
+    }
+
+    public static void load() throws IOException {
+        File file = new File(CONFIG_FILE);
+        ObjectMapper om = new ObjectMapper();
+        try {
+            instance = om.readValue(file, KBackupConfig.class);
+        } catch (FileNotFoundException ignored) {
+            // generate default config file
+            PrintUtil.info("Config file does not exist. Creating default config: " + CONFIG_FILE);
+            instance = getDefault();
+            ObjectWriter w = om.writerWithDefaultPrettyPrinter();
+            w.writeValue(file, instance);
+        }
+    }
+
+    public KBackupConfig() {
+    }
+
+    public KBackupConfig(Boolean incbakCow) {
+        this.incbakCow = incbakCow;
+    }
+
+    public Boolean getIncbakCow() {
+        return this.incbakCow;
+    }
+
+    public void setIncbakCow(Boolean incbakCow) {
+        this.incbakCow = incbakCow;
+    }
+}
\ No newline at end of file