Package org.syncany.operations.up

Class UpOperation

java.lang.Object

org.syncany.operations.Operation

org.syncany.operations.AbstractTransferOperation

org.syncany.operations.up.UpOperation

public class UpOperation
extends AbstractTransferOperation

The up operation implements a central part of Syncany's business logic. It analyzes the local folder, deduplicates new or changed files and uploads newly packed multichunks to the remote storage. The up operation is the complement to the DownOperation.

The general operation flow is as follows:

1. Load local database (if not already loaded)
2. Analyze local directory using the StatusOperation to determine any changed/new/deleted files
3. Determine if there are unknown remote databases using the LsRemoteOperation, and skip the rest if there are
4. If there are changes, use the Deduper and Indexer to create a new DatabaseVersion (including new chunks, multichunks, file contents and file versions).
5. Upload new multichunks (if any) using a TransferManager
6. Save new DatabaseVersion to a new (delta) MemoryDatabase and upload it
7. Add delta database to local database and store it locally

Besides the normal behavior of creating transactions from local changes and uploading these, this class is also able to upload existing transactions that have been interrupted during a previous upload attempt. The up operation analyzes maps the local changes over a number of transactions. The size of these transactions are based on the settings in UpOperationOptions. If a sequence of transactions is interrupted, all queued transactions are written to disk to be resumed later. The next up operation then reads these transactions and resumes them in the same order as they were queued before the interruption.

Field Summary

Fields

Modifier and Type	Field	Description
static java.lang.String	ACTION_ID

Fields inherited from class org.syncany.operations.AbstractTransferOperation

actionHandler, eventBus, transferManager

Fields inherited from class org.syncany.operations.Operation

config

Constructor Summary

Constructors

Constructor	Description
UpOperation(Config config)
UpOperation(Config config, UpOperationOptions options)

Method Summary

Modifier and Type	Method	Description
UpOperationResult	execute()	Executes the operation synchronously and returns a result when the operation exits.
protected void	saveDeltaDatabase(MemoryDatabase db, java.io.File localDatabaseFile)	Serializes a MemoryDatabase to a file, using the configured transformer.

Methods inherited from class org.syncany.operations.AbstractTransferOperation

finishOperation, getLastRemoteCleanupNumber, getNewestDatabaseFileVersion, otherRemoteOperationsRunning, startOperation

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

ACTION_ID

public static final java.lang.String ACTION_ID

See Also:

Constant Field Values

Constructor Detail

UpOperation

public UpOperation(Config config)

UpOperation

public UpOperation(Config config,
                   UpOperationOptions options)

Method Detail

execute

public UpOperationResult execute()
                          throws java.lang.Exception

Description copied from class: Operation

Executes the operation synchronously and returns a result when the operation exits. Using covariance is recommend, that is OperationFoo should override execute so as to return a OperationFooResult rather than OperationResult.

Specified by:

execute in class Operation

Returns:

Returns an operation-specific operation result

Throws:

java.lang.Exception - If the operation fails

saveDeltaDatabase

protected void saveDeltaDatabase(MemoryDatabase db,
                                 java.io.File localDatabaseFile)
                          throws java.io.IOException

Serializes a MemoryDatabase to a file, using the configured transformer.

Throws:

java.io.IOException