org.modeshape.jcr.value.binary

## Interface BinaryStore

- All Known Implementing Classes:
    AbstractBinaryStore, CassandraBinaryStore, CompositeBinaryStore, DatabaseBinaryStore, FileSystemBinaryStore, InfinispanBinaryStore, MongodbBinaryStore, TransientBinaryStore

      @ThreadSafe
      public interface BinaryStore

  The basic interface for a store for Binary value objects. All binary values that are of a `minimum threshold size` are stored in the store; smaller binary values are kept in-memory and are stored within the nodes.

- - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `Iterable<BinaryKey>` | `getAllBinaryKeys()` Obtain an iterable implementation containing all of the store's binary keys.
    `InputStream` | `getInputStream(BinaryKey key)` Get an `InputStream` to the binary content with the supplied key.
    `String` | `getMimeType(BinaryValue binary, String name)` Get the MIME type for this binary value, never `null`.
    `long` | `getMinimumBinarySizeInBytes()` Get the minimum number of bytes that a binary value must contain before it can be stored in the binary store.
    `String` | `getText(BinaryValue binary)` Get the text that can be extracted from this binary content.
    `boolean` | `hasBinary(BinaryKey key)` Searches for a binary which has the given key in this store.
    `void` | `markAsUnused(Iterable<BinaryKey> keys)` Mark the supplied binary keys as unused, but key them in quarantine until needed again (at which point they're removed from quarantine) or until `removeValuesUnusedLongerThan(long, TimeUnit)` is called.
    `void` | `removeValuesUnusedLongerThan(long minimumAge, TimeUnit unit)` Remove binary values that have been `unused` for at least the specified amount of time.
    `void` | `setMimeTypeDetector(MimeTypeDetector mimeTypeDetector)` Set the MIME type detector that can be used for determining the MIME type for binary content.
    `void` | `setMinimumBinarySizeInBytes(long minSizeInBytes)` Set the minimum number of bytes that a binary value must contain before it can be stored in the binary store.
    `void` | `setTextExtractors(TextExtractors textExtractors)` Set the text extractor that can be used for extracting text from binary content.
    `void` | `shutdown()` Shuts down the store.
    `void` | `start()` Initialize the store and get ready for use.
    `BinaryValue` | `storeValue(InputStream stream)` Store the binary value and return the JCR representation.
    `BinaryValue` | `storeValue(InputStream stream, String hint)` Store the binary value and return the JCR representation.

- - ### Method Detail

    - #### start

          void start()

      Initialize the store and get ready for use.

    - #### shutdown

          void shutdown()

      Shuts down the store.

    - #### getMinimumBinarySizeInBytes

          long getMinimumBinarySizeInBytes()

      Get the minimum number of bytes that a binary value must contain before it can be stored in the binary store.
      Returns:
        the minimum number of bytes for a stored binary value; never negative

    - #### setMinimumBinarySizeInBytes

          void setMinimumBinarySizeInBytes(long minSizeInBytes)

      Set the minimum number of bytes that a binary value must contain before it can be stored in the binary store.
      Parameters:
        `minSizeInBytes` - the minimum number of bytes for a stored binary value; may not be negative

    - #### setTextExtractors

          void setTextExtractors(TextExtractors textExtractors)

      Set the text extractor that can be used for extracting text from binary content.
      Parameters:
        `textExtractors` - a non-null `TextExtractors` instance

    - #### setMimeTypeDetector

          void setMimeTypeDetector(MimeTypeDetector mimeTypeDetector)

      Set the MIME type detector that can be used for determining the MIME type for binary content.
      Parameters:
        `mimeTypeDetector` - the detector

    - #### storeValue

          BinaryValue storeValue(InputStream stream)
                                 throws BinaryStoreException

      Store the binary value and return the JCR representation. Note that if the binary content in the supplied stream is already persisted in the store, the store may simply return the binary value referencing the existing content.
      Parameters:
        `stream` - the stream containing the binary content to be stored; may not be null
      Returns:
        the binary value representing the stored binary value; never null
      Throws:
        `BinaryStoreException` - if there any unexpected problem

    - #### storeValue

          BinaryValue storeValue(InputStream stream,
                               String hint)
                                 throws BinaryStoreException

      Store the binary value and return the JCR representation. Note that if the binary content in the supplied stream is already persisted in the store, the store may simply return the binary value referencing the existing content.
      Parameters:
        `stream` - the stream containing the binary content to be stored; may not be null
        `hint` - a hint that the BinaryStore may use to make storage decisions about this input stream
      Returns:
        the binary value representing the stored binary value; never null
      Throws:
        `BinaryStoreException` - if there any unexpected problem

    - #### getInputStream

          InputStream getInputStream(BinaryKey key)
                                     throws BinaryStoreException

      Get an `InputStream` to the binary content with the supplied key.
      Parameters:
        `key` - the key to the binary content; never null
      Returns:
        the input stream through which the content can be read, `never null`
      Throws:
        `BinaryStoreException` - if there is a problem reading the content from the store or if a valid, non-null `InputStream` cannot be returned for the given key.

    - #### hasBinary

          boolean hasBinary(BinaryKey key)

      Searches for a binary which has the given key in this store.
      Parameters:
        `key` - a non-null `BinaryKey` instance
      Returns:
        `true` if a binary with this key exists in this store, `false` otherwise.

    - #### markAsUnused

          void markAsUnused(Iterable<BinaryKey> keys)
                            throws BinaryStoreException

      Mark the supplied binary keys as unused, but key them in quarantine until needed again (at which point they're removed from quarantine) or until `removeValuesUnusedLongerThan(long, TimeUnit)` is called. This method ignores any keys for values not stored within this store.
      Parameters:
        `keys` - the keys for the binary values that are no longer needed
      Throws:
        `BinaryStoreException` - if there is a problem marking any of the supplied binary values as unused

    - #### removeValuesUnusedLongerThan

          void removeValuesUnusedLongerThan(long minimumAge,
                                          TimeUnit unit)
                                            throws BinaryStoreException

      Remove binary values that have been `unused` for at least the specified amount of time.
      Parameters:
        `minimumAge` - the minimum time that a binary value has been `unused` before it can be removed; must be non-negative
        `unit` - the time unit for the minimum age; may not be null
      Throws:
        `BinaryStoreException` - if there is a problem removing the unused values

    - #### getText

          String getText(BinaryValue binary)
                         throws BinaryStoreException

      Get the text that can be extracted from this binary content. If text extraction isn't enabled (either full text search is not enabled or there aren't any configured extractors), this returns `null`

      If extraction is enabled, this method may block until a text extractor has finished extracting the text.

      If there are any problems either with the binary value or during the extraction process, the exception will be logged and `null` is returned

      In general, the implementation from `AbstractBinaryStore` should be enough and any custom `BinaryStore` implementations aren't expected to implement this.
      Parameters:
        `binary` - the binary content; may not be null
      Returns:
        the extracted text, or null if none could be extracted
      Throws:
        `BinaryStoreException` - if the binary content could not be accessed or if the given binary value cannot be found within the store.

    - #### getMimeType

          String getMimeType(BinaryValue binary,
                           String name)
                             throws IOException,
                                    RepositoryException

      Get the MIME type for this binary value, never `null`.

      If the store has never determined the mime-type of the given binary and the binary can be located in the store, it will attempt to determine it via the configured `detectors` and store it.

      Parameters:
        `binary` - the binary content; may not be null
        `name` - the name of the content, useful for determining the MIME type; may be null if not known
      Returns:
        the MIME type of the content, as determined by the installed detectors or `null` if none of the detectors can determine it.
      Throws:
        `IOException` - if there is a problem reading the binary content
        `BinaryStoreException` - if the binary value cannot be found in the store
        `RepositoryException` - if any other error occurs.

    - #### getAllBinaryKeys

          Iterable<BinaryKey> getAllBinaryKeys()
                                               throws BinaryStoreException

      Obtain an iterable implementation containing all of the store's binary keys. The resulting iterator may be lazy, in the sense that it may determine additional `BinaryKey`s only as the iterator is used.
      Returns:
        the iterable set of binary keys; never null
      Throws:
        `BinaryStoreException` - if anything unexpected happens.

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