Class SVNRepositoryReplicator

  • All Implemented Interfaces:
    ISVNCanceller, ISVNEventHandler

    public class SVNRepositoryReplicator
    extends java.lang.Object
    implements ISVNEventHandler
    The SVNRepositoryReplicator class provides an ability to make a copy of an existing repository. The replicator does not create a repository for itself, so, both repositories, source and target, must already exist.

    There's two general strategies for a replicator:

    • Copying a range of revisions.
    • Incremental copying (like the first one, but copies a special range of revisions).

    If the range of revisions being copied is [start, end], then the target repository's last revision must be start - 1. For example, when copying from the very beginning of a source repository, you pass start = 1, what means that the target repository's latest revision must be 0.

    An incremental copying means copying from a source repository a revisions range starting at the revision equal to the target repository's latest revision + 1 (including) and up to the source repository's latest revision (also including). This allows to fill up missing revisions from the source repository in the target one, when you, say, once replicated the source repository and got some extra new revisions in it since then.

    On condition that a user has got read permissions on the entire source repository and write permissions on the destination one, replicating guarantees that for each N th revision copied from the source repository the user'll have in the N th revision of the destination repository the same changes in both versioned and unversioned (revision properties) data except locks as in the source repository.

    With modern Subersion servers you may alternatively use SVNRepository.replay(long, long, boolean, ISVNEditor) for repository replication purposes.

    Since:
    1.2
    Version:
    1.3
    Author:
    TMate Software Ltd.
    • Method Detail

      • newInstance

        public static SVNRepositoryReplicator newInstance()
        Creates a new repository replicator.
        Returns:
        a new replicator
      • replicateRepository

        public long replicateRepository​(SVNRepository src,
                                        SVNRepository dst,
                                        boolean incremental)
                                 throws SVNException
        Replicates a repository either incrementally or totally.

        If incremental is true then copies a range of revisions from the source repository starting at the revision equal to dst.getLatestRevision() + 1 (including) and expandig to src.getLatestRevision().

        If incremental is false then the revision range to copy is [1, src.getLatestRevision()].

        Both src and dst must be created for the root locations of the repositories.

        Parameters:
        src - a source repository to copy from
        dst - a destination repository to copy into
        incremental - controls the way of copying
        Returns:
        the number of copied revisions
        Throws:
        SVNException
        See Also:
        replicateRepository(SVNRepository,SVNRepository,long,long)
      • replicateRepository

        public long replicateRepository​(SVNRepository src,
                                        SVNRepository dst,
                                        long fromRevision,
                                        long toRevision)
                                 throws SVNException
        Replicates a range of repository revisions.

        Starts copying from fromRevision (including) and expands to toRevision. If fromRevision <= 0 then it defaults to revision 1. If toRevision doesn't lie in (0, src.getLatestRevision()], it defaults to src.getLatestRevision(). The latest revision of the destination repository must be equal to fromRevision - 1, where fromRevision is already a valid revision.

        The replicator uses a log operation to investigate the changed paths in every revision to be copied. So, for each revision being replicated an appropriate event with log information for that revision is fired (fireReplicatingEvent(SVNLogEntry)) to the registered handler (if any). Also during each copy iteration the replicator tests the handler's checkCancelled() method to check if the replication operation is cancelled. At the end of the copy operation the replicator (fireReplicatedEvent(SVNCommitInfo)) yet one event with commit information about the replicated revision.

        Both src and dst must be created for the root locations of the repositories.

        Parameters:
        src - a source repository to copy from
        dst - a destination repository to copy into
        fromRevision - a start revision
        toRevision - a final revision
        Returns:
        the number of revisions copied from the source repository
        Throws:
        SVNException
        See Also:
        replicateRepository(SVNRepository,SVNRepository,boolean)
      • setReplicationHandler

        public void setReplicationHandler​(ISVNReplicationHandler handler)
        Registers a replication handler to this replicator. This handler will be notified of every revision to be copied and provided with corresponding log information (taken from the source repository) concerning that revision. Also the handler is notified as a next source repository revision is already replicated, this time the handler is dispatched commit information on the revision. In addition, during each replicating iteration the handler is used to check whether the operation is cancelled.
        Parameters:
        handler - a replication handler
      • fireReplicatingEvent

        protected void fireReplicatingEvent​(SVNLogEntry revision)
                                     throws SVNException
        Fires a replicating iteration started event to the registered handler.
        Parameters:
        revision - log information about the revision to be copied
        Throws:
        SVNException
      • fireReplicatedEvent

        protected void fireReplicatedEvent​(SVNCommitInfo commitInfo)
                                    throws SVNException
        Fires a replicating iteration finished event to the registered handler.
        Parameters:
        commitInfo - commit info about the copied revision (includes revision number, date, author)
        Throws:
        SVNException