Working backups

[lgpl/argeo-commons.git] / server / runtime / org.argeo.server.core / src / main / java / org / argeo / server / backup / AbstractAtomicBackup.java

diff --git a/server/runtime/org.argeo.server.core/src/main/java/org/argeo/server/backup/AbstractAtomicBackup.java b/server/runtime/org.argeo.server.core/src/main/java/org/argeo/server/backup/AbstractAtomicBackup.java
new file mode 100644 (file)
index 0000000..dd47651
--- /dev/null
+++ b/server/runtime/org.argeo.server.core/src/main/java/org/argeo/server/backup/AbstractAtomicBackup.java
@@ -0,0 +1,70 @@
+package org.argeo.server.backup;
+
+import org.apache.commons.vfs.FileObject;
+import org.apache.commons.vfs.FileSystemManager;
+import org.apache.commons.vfs.FileSystemOptions;
+import org.apache.commons.vfs.provider.sftp.SftpFileSystemConfigBuilder;
+import org.argeo.ArgeoException;
+
+/**
+ * Simplify atomic backups implementation, especially by managing VFS.
+ */
+public abstract class AbstractAtomicBackup implements AtomicBackup {
+       private String name;
+       private String compression = "bz2";
+
+       protected abstract void writeBackup(FileObject targetFo);
+
+       public AbstractAtomicBackup() {
+       }
+
+       public AbstractAtomicBackup(String name) {
+               this.name = name;
+       }
+
+       @Override
+       public String backup(FileSystemManager fileSystemManager,
+                       String backupsBase, BackupContext backupContext,
+                       FileSystemOptions opts) {
+               if (name == null)
+                       throw new ArgeoException("Atomic backup name must be set");
+
+               FileObject targetFo = null;
+               try {
+                       if (backupsBase.startsWith("sftp:"))
+                               SftpFileSystemConfigBuilder.getInstance()
+                                               .setStrictHostKeyChecking(opts, "no");
+                       if (compression == null || compression.equals("none"))
+                               targetFo = fileSystemManager.resolveFile(backupsBase + '/'
+                                               + backupContext.getRelativeFolder() + '/' + name, opts);
+                       else if (compression.equals("bz2"))
+                               targetFo = fileSystemManager.resolveFile("bz2:" + backupsBase
+                                               + '/' + backupContext.getRelativeFolder() + '/' + name
+                                               + ".bz2" + "!" + name, opts);
+                       else if (compression.equals("gz"))
+                               targetFo = fileSystemManager.resolveFile("gz:" + backupsBase
+                                               + '/' + backupContext.getRelativeFolder() + '/' + name
+                                               + ".gz" + "!" + name, opts);
+                       else
+                               throw new ArgeoException("Unsupported compression "
+                                               + compression);
+
+                       writeBackup(targetFo);
+
+                       return targetFo.toString();
+               } catch (Exception e) {
+                       throw new ArgeoException("Cannot backup " + name + " to "
+                                       + targetFo, e);
+               } finally {
+                       BackupUtils.closeFOQuietly(targetFo);
+               }
+       }
+
+       public void setName(String name) {
+               this.name = name;
+       }
+
+       public void setCompression(String compression) {
+               this.compression = compression;
+       }
+}