Package org.imixs.archive.service.cassandra

Class DataService

java.lang.Object
org.imixs.archive.service.cassandra.DataService
public class DataService extends Object
The SnapshotService is used to store a imixs snapshot into the cluster keyspace.
Author:
rsoika

  • Field Details

  • Constructor Details

    • DataService

      public DataService()

  • Method Details

    • saveSnapshot

      public void saveSnapshot(org.imixs.workflow.ItemCollection snapshot) throws ArchiveException
      This method saves a ItemCollection into a specific KeySpace.

      The method expects a valid session instance which must be closed by the client.

      Parameters:
      snapshot - - ItemCollection object
      session - - cassandra session
      Throws:
      ArchiveException

    • existSnapshot

      public boolean existSnapshot(String snapshotID)
      This method test if a snapshot recored with a given ID already exists.
      Parameters:
      snapshotID -
      Returns:
      true if the snapshot exists.

    • loadSnapshot

      public org.imixs.workflow.ItemCollection loadSnapshot(String snapshotID) throws ArchiveException
      This method loads a snapshot form the cassandra cluster. The snapshot data includes also the accociated document data. In case you need only the snapshotdata without documents use loadSnapshot(id,false,session).
      Parameters:
      snapshotID - - snapshot id
      session - - cassandra session
      Returns:
      snapshot data including documents
      Throws:
      ArchiveException

    • loadSnapshot

      public org.imixs.workflow.ItemCollection loadSnapshot(String snapshotID, boolean mergeDocuments) throws ArchiveException
      Thist method loads a snapshot form the cassandra cluster.

      Parameters:
      snapshotID - - snapshot id
      mergeDocuments - - boolean, if true the accociated document data will be loaded and merged into the snapshot data object.
      session - - cassandra session
      Returns:
      snapshot data
      Throws:
      ArchiveException

    • loadSnapshotsByUnqiueID

      public List<String> loadSnapshotsByUnqiueID(String uniqueID, int maxCount, boolean descending)
      This method loads all existing snapshotIDs for a given unqiueID.

      Parameters:
      uniqueID -
      maxCount - - max search result
      descending - - sort result descending
      Returns:
      list of snapshots

    • loadSnapshotsByDate

      public List<String> loadSnapshotsByDate(LocalDate date)
      This method loads all exsting snapshotIDs for a given date.
      Parameters:
      date -
      Returns:
      list of snapshots or an empty list if no snapshots exist for the given date

    • loadFileData

      public org.imixs.workflow.FileData loadFileData(org.imixs.workflow.FileData fileData) throws ArchiveException
      This helper method loades the content of a document defned by a FileData object. A document is uniquely identified by its md5 checksum which is part of the FileData custom attributes. The data of the document is stored in split 1md data blocks in the tabe 'documents_data'
      Parameters:
      itemCol -
      Throws:
      ArchiveException

    • loadFileContent

      public byte[] loadFileContent(String md5) throws ArchiveException
      This helper method loads the content of a document defned by its MD5 checksum. The data of the document is stored in chunked 1md data blocks in the table 'documents_data'
      Parameters:
      itemCol -
      Throws:
      ArchiveException

    • loadMetadata

      public org.imixs.workflow.ItemCollection loadMetadata() throws ArchiveException
      This method loads the metadata object represended by an ItemCollection. The snapshot id for the metadata object is always "0". This id is reserverd for metadata only.

      If no metadata object yet exists, the method returns an empty ItemCollection.

      The method expects a valid session instance which must be closed by the client.

      Returns:
      metadata object
      Throws:
      ArchiveException

    • saveMetadata

      public void saveMetadata(org.imixs.workflow.ItemCollection metadata) throws ArchiveException
      This method saves the metadata represented by an ItemCollection. The snapshot id for the metadata object is always "0". This id is reserverd for metadata only.

      The method expects a valid session instance which must be closed by the client.

      Parameters:
      itemCol - - metadata
      Throws:
      ArchiveException

    • deleteSnapshot

      public void deleteSnapshot(String snapshotID) throws ArchiveException
      This method deletes a single snapshot instance.

      The method also deletes the documents and all relations

      Parameters:
      snapshotID - - id of the snapshot
      Throws:
      ArchiveException

    • getRawData

      public byte[] getRawData(org.imixs.workflow.ItemCollection itemCol) throws ArchiveException
      Converts a ItemCollection into a XMLDocument and returns the byte data.
      Parameters:
      itemCol -
      Returns:
      Throws:
      ArchiveException

    • getItemCollection

      public org.imixs.workflow.ItemCollection getItemCollection(byte[] source) throws ArchiveException
      Converts a byte array into a XMLDocument and returns the ItemCollection object.
      Throws:
      ArchiveException

    • isSnapshotID

      public boolean isSnapshotID(String uid)
      This method returns true if the given id is a valid Snapshot id (UUI + timestamp

      We also need to support the old snapshto format 4832b09a1a-20c38abd-1519421083952

      Parameters:
      uid -
      Returns:

    • getUniqueID

      public String getUniqueID(String snapshotID)
      Returns the $uniqueID from a $SnapshotID
      Parameters:
      snapshotID -
      Returns:
      $uniqueid

    • getSnapshotTime

      public long getSnapshotTime(String snapshotID)
      Returns the snapshot time n millis of a $SnapshotID
      Parameters:
      snapshotID -
      Returns:
      long - snapshot time

    • calculateSize

      public long calculateSize(org.imixs.workflow.xml.XMLDocument xmldoc)
      count total value size...
      Parameters:
      xmldoc -
      Returns:

    • getSyncPointISO

      public String getSyncPointISO(long point)
      returns the date tiem from a date in iso format
      Returns: