Package com.apple.foundationdb

Interface Tenant

  • All Superinterfaces:
    java.lang.AutoCloseable, ReadTransactionContext, TransactionContext
    public interface Tenant
extends java.lang.AutoCloseable, TransactionContext
    A tenant represents a named key-space within a database that can be interacted with transactionally.

    The simplest correct programs using tenants will make use of the methods defined in the TransactionContext interface. When used on a Tenant these methods will call Transaction#commit() after user code has been executed. These methods will not return successfully until commit() has returned successfully.

    Note: Tenant objects must be closed when no longer in use in order to free any associated resources.

    • Method Detail

      • createTransaction

        Transaction createTransaction​(java.util.concurrent.Executor e)
        Creates a Transaction that operates on this Tenant with the given Executor for asynchronous callbacks.
        Parameters:
        e - the Executor to use when executing asynchronous callbacks.
        Returns:
        a newly created Transaction that reads from and writes to this Tenant.

      • createTransaction

        Transaction createTransaction​(java.util.concurrent.Executor e,
                              EventKeeper eventKeeper)
        Creates a Transaction that operates on this Tenant with the given Executor for asynchronous callbacks.
        Parameters:
        e - the Executor to use when executing asynchronous callbacks.
        eventKeeper - the EventKeeper to use when tracking instrumented calls for the transaction.
        Returns:
        a newly created Transaction that reads from and writes to this Tenant.

      • getName

        byte[] getName()
        Returns the name of this Tenant.
        Returns:
        the name of this Tenant as a byte string.

      • read

        default <T> T read​(java.util.function.Function<? super ReadTransaction,​T> retryable)
        Runs a read-only transactional function against this Tenant with retry logic. apply(ReadTransaction) will be called on the supplied Function until a non-retryable FDBException (or any Throwable other than an FDBException) is thrown. This call is blocking -- this method will not return until the Function has been called and completed without error.
        Specified by:
        read in interface ReadTransactionContext
        Type Parameters:
        T - the return type of retryable
        Parameters:
        retryable - the block of logic to execute in a Transaction against this tenant
        Returns:
        the result of the last run of retryable

      • read

        <T> T read​(java.util.function.Function<? super ReadTransaction,​T> retryable,
           java.util.concurrent.Executor e)
        Runs a read-only transactional function against this Tenant with retry logic. Use this formulation of read(Function) if one wants to set a custom Executor for the transaction when run.
        Type Parameters:
        T - the return type of retryable
        Parameters:
        retryable - the block of logic to execute in a Transaction against this tenant
        e - the Executor to use for asynchronous callbacks
        Returns:
        the result of the last run of retryable
        See Also:
        read(Function)

      • readAsync

        default <T> java.util.concurrent.CompletableFuture<T> readAsync​(java.util.function.Function<? super ReadTransaction,​? extends java.util.concurrent.CompletableFuture<T>> retryable)
        Runs a read-only transactional function against this Tenant with retry logic. apply(ReadTransaction) will be called on the supplied Function until a non-retryable FDBException (or any Throwable other than an FDBException) is thrown. This call is non-blocking -- this method will return immediately and with a CompletableFuture that will be set when the Function has been called and completed without error.

        Any errors encountered executing retryable, or received from the database, will be set on the returned CompletableFuture.
        Specified by:
        readAsync in interface ReadTransactionContext
        Type Parameters:
        T - the return type of retryable
        Parameters:
        retryable - the block of logic to execute in a ReadTransaction against this tenant
        Returns:
        a CompletableFuture that will be set to the value returned by the last call to retryable

      • readAsync

        <T> java.util.concurrent.CompletableFuture<T> readAsync​(java.util.function.Function<? super ReadTransaction,​? extends java.util.concurrent.CompletableFuture<T>> retryable,
                                                        java.util.concurrent.Executor e)
        Runs a read-only transactional function against this Tenant with retry logic. Use this version of readAsync(Function) if one wants to set a custom Executor for the transaction when run.
        Type Parameters:
        T - the return type of retryable
        Parameters:
        retryable - the block of logic to execute in a ReadTransaction against this tenant
        e - the Executor to use for asynchronous callbacks
        Returns:
        a CompletableFuture that will be set to the value returned by the last call to retryable
        See Also:
        readAsync(Function)

      • run

        default <T> T run​(java.util.function.Function<? super Transaction,​T> retryable)
        Runs a transactional function against this Tenant with retry logic. apply(Transaction) will be called on the supplied Function until a non-retryable FDBException (or any Throwable other than an FDBException) is thrown or commit(), when called after apply(), returns success. This call is blocking -- this method will not return until commit() has been called and returned success.

        As with other client/server databases, in some failure scenarios a client may be unable to determine whether a transaction succeeded. In these cases, your transaction may be executed twice. For more information about how to reason about these situations see the FounationDB Developer Guide
        Specified by:
        run in interface TransactionContext
        Type Parameters:
        T - the return type of retryable
        Parameters:
        retryable - the block of logic to execute in a Transaction against this tenant
        Returns:
        the result of the last run of retryable

      • run

        <T> T run​(java.util.function.Function<? super Transaction,​T> retryable,
          java.util.concurrent.Executor e)
        Runs a transactional function against this Tenant with retry logic. Use this formulation of run(Function) if one would like to set a custom Executor for the transaction when run.
        Type Parameters:
        T - the return type of retryable
        Parameters:
        retryable - the block of logic to execute in a Transaction against this tenant
        e - the Executor to use for asynchronous callbacks
        Returns:
        the result of the last run of retryable

      • runAsync

        default <T> java.util.concurrent.CompletableFuture<T> runAsync​(java.util.function.Function<? super Transaction,​? extends java.util.concurrent.CompletableFuture<T>> retryable)
        Runs a transactional function against this Tenant with retry logic. apply(Transaction) will be called on the supplied Function until a non-retryable FDBException (or any Throwable other than an FDBException) is thrown or commit(), when called after apply(), returns success. This call is non-blocking -- this method will return immediately and with a CompletableFuture that will be set when commit() has been called and returned success.

        As with other client/server databases, in some failure scenarios a client may be unable to determine whether a transaction succeeded. In these cases, your transaction may be executed twice. For more information about how to reason about these situations see the FounationDB Developer Guide

        Any errors encountered executing retryable, or received from the database, will be set on the returned CompletableFuture.
        Specified by:
        runAsync in interface TransactionContext
        Type Parameters:
        T - the return type of retryable
        Parameters:
        retryable - the block of logic to execute in a Transaction against this tenant
        Returns:
        a CompletableFuture that will be set to the value returned by the last call to retryable

      • runAsync

        <T> java.util.concurrent.CompletableFuture<T> runAsync​(java.util.function.Function<? super Transaction,​? extends java.util.concurrent.CompletableFuture<T>> retryable,
                                                       java.util.concurrent.Executor e)
        Runs a transactional function against this Tenant with retry logic. Use this formulation of the non-blocking runAsync(Function) if one wants to set a custom Executor for the transaction when run.
        Type Parameters:
        T - the return type of retryable
        Parameters:
        retryable - the block of logic to execute in a Transaction against this tenant
        e - the Executor to use for asynchronous callbacks
        Returns:
        a CompletableFuture that will be set to the value returned by the last call to retryable
        See Also:
        run(Function)

      • purgeBlobGranules

        default java.util.concurrent.CompletableFuture<byte[]> purgeBlobGranules​(byte[] beginKey,
                                                                         byte[] endKey,
                                                                         boolean force)
        Runs purgeBlobGranules(byte[] beginKey, byte[] endKey, boolean force) on the default executor.
        Parameters:
        beginKey - start of the key range
        endKey - end of the key range
        force - if true delete all data, if not keep data >= purgeVersion
        Returns:
        the key to watch for purge complete

      • purgeBlobGranules

        default java.util.concurrent.CompletableFuture<byte[]> purgeBlobGranules​(byte[] beginKey,
                                                                         byte[] endKey,
                                                                         long purgeVersion,
                                                                         boolean force)
        Runs purgeBlobGranules(byte[] beginKey, byte[] endKey, long purgeVersion, boolean force) on the default executor.
        Parameters:
        beginKey - start of the key range
        endKey - end of the key range
        purgeVersion - version to purge at
        force - if true delete all data, if not keep data >= purgeVersion
        Returns:
        the key to watch for purge complete

      • purgeBlobGranules

        java.util.concurrent.CompletableFuture<byte[]> purgeBlobGranules​(byte[] beginKey,
                                                                 byte[] endKey,
                                                                 long purgeVersion,
                                                                 boolean force,
                                                                 java.util.concurrent.Executor e)
        Queues a purge of blob granules for specified key range of this tenant, at the specified version.
        Parameters:
        beginKey - start of the key range
        endKey - end of the key range
        purgeVersion - version to purge at
        force - if true delete all data, if not keep data >= purgeVersion
        e - the Executor to use for asynchronous callbacks
        Returns:
        the key to watch for purge complete

      • waitPurgeGranulesComplete

        default java.util.concurrent.CompletableFuture<java.lang.Void> waitPurgeGranulesComplete​(byte[] purgeKey)
        Runs waitPurgeGranulesComplete(byte[] purgeKey) on the default executor.
        Parameters:
        purgeKey - key to watch
        Returns:
        -- undocumented

      • waitPurgeGranulesComplete

        java.util.concurrent.CompletableFuture<java.lang.Void> waitPurgeGranulesComplete​(byte[] purgeKey,
                                                                                 java.util.concurrent.Executor e)
        Wait for a previous call to purgeBlobGranules to complete.
        Parameters:
        purgeKey - key to watch
        e - the Executor to use for asynchronous callbacks
        Returns:
        -- undocumented

      • blobbifyRange

        default java.util.concurrent.CompletableFuture<java.lang.Boolean> blobbifyRange​(byte[] beginKey,
                                                                                byte[] endKey)
        Runs blobbifyRange(byte[] beginKey, byte[] endKey) on the default executor.
        Parameters:
        beginKey - start of the key range
        endKey - end of the key range
        Returns:
        if the recording of the range was successful

      • blobbifyRange

        java.util.concurrent.CompletableFuture<java.lang.Boolean> blobbifyRange​(byte[] beginKey,
                                                                        byte[] endKey,
                                                                        java.util.concurrent.Executor e)
        Sets a range to be blobbified in this tenant. Must be a completely unblobbified range.
        Parameters:
        beginKey - start of the key range
        endKey - end of the key range
        e - the Executor to use for asynchronous callbacks
        Returns:
        if the recording of the range was successful

      • unblobbifyRange

        default java.util.concurrent.CompletableFuture<java.lang.Boolean> unblobbifyRange​(byte[] beginKey,
                                                                                  byte[] endKey)
        Runs unblobbifyRange(byte[] beginKey, byte[] endKey) on the default executor.
        Parameters:
        beginKey - start of the key range
        endKey - end of the key range
        Returns:
        if the recording of the range was successful

      • unblobbifyRange

        java.util.concurrent.CompletableFuture<java.lang.Boolean> unblobbifyRange​(byte[] beginKey,
                                                                          byte[] endKey,
                                                                          java.util.concurrent.Executor e)
        Unsets a blobbified range in this tenant. The range must be aligned to known blob ranges.
        Parameters:
        beginKey - start of the key range
        endKey - end of the key range
        e - the Executor to use for asynchronous callbacks
        Returns:
        if the recording of the range was successful

      • listBlobbifiedRanges

        default java.util.concurrent.CompletableFuture<KeyRangeArrayResult> listBlobbifiedRanges​(byte[] beginKey,
                                                                                         byte[] endKey,
                                                                                         int rangeLimit)
        Runs listBlobbifiedRanges(byte[] beginKey, byte[] endKey, int rangeLimit) on the default executor.
        Parameters:
        beginKey - start of the key range
        endKey - end of the key range
        rangeLimit - batch size
        Returns:
        a future with the list of blobbified ranges: [lastLessThan(beginKey), firstGreaterThanOrEqual(endKey)]

      • listBlobbifiedRanges

        java.util.concurrent.CompletableFuture<KeyRangeArrayResult> listBlobbifiedRanges​(byte[] beginKey,
                                                                                 byte[] endKey,
                                                                                 int rangeLimit,
                                                                                 java.util.concurrent.Executor e)
        Lists blobbified ranges in this tenant. There may be more if result.size() == rangeLimit.
        Parameters:
        beginKey - start of the key range
        endKey - end of the key range
        rangeLimit - batch size
        e - the Executor to use for asynchronous callbacks
        Returns:
        a future with the list of blobbified ranges: [lastLessThan(beginKey), firstGreaterThanOrEqual(endKey)]

      • verifyBlobRange

        default java.util.concurrent.CompletableFuture<java.lang.Long> verifyBlobRange​(byte[] beginKey,
                                                                               byte[] endKey)
        Runs verifyBlobRange(byte[] beginKey, byte[] endKey) on the default executor.
        Parameters:
        beginKey - start of the key range
        endKey - end of the key range
        Returns:
        a future with the version of the last blob granule.

      • verifyBlobRange

        default java.util.concurrent.CompletableFuture<java.lang.Long> verifyBlobRange​(byte[] beginKey,
                                                                               byte[] endKey,
                                                                               long version)
        Runs verifyBlobRange(byte[] beginKey, byte[] endKey, long version) on the default executor.
        Parameters:
        beginKey - start of the key range
        endKey - end of the key range
        version - version to read at
        Returns:
        a future with the version of the last blob granule.

      • verifyBlobRange

        java.util.concurrent.CompletableFuture<java.lang.Long> verifyBlobRange​(byte[] beginKey,
                                                                       byte[] endKey,
                                                                       long version,
                                                                       java.util.concurrent.Executor e)
        Checks if a blob range is blobbified in this tenant.
        Parameters:
        beginKey - start of the key range
        endKey - end of the key range
        version - version to read at
        e - the executor
        Returns:
        a future with the version of the last blob granule.

      • close

        void close()
        Close the Tenant object and release any associated resources. This must be called at least once after the Tenant object is no longer in use. This can be called multiple times, but care should be taken that it is not in use in another thread at the time of the call.
        Specified by:
        close in interface java.lang.AutoCloseable