org.apache.ignite.cache

## Interface CacheMetrics

- All Known Subinterfaces:
    CacheMetricsMXBean

      public interface CacheMetrics

  Cache metrics used to obtain statistics on cache itself. Use `IgniteCache.metrics()` to obtain metrics for a cache.

- - ### Method Summary

    All Methods Instance Methods Abstract Methods Deprecated Methods
    Modifier and Type | Method and Description
    --- | ---
    `long` | `estimateRebalancingFinishTime()` Deprecated.
    `float` | `getAverageGetTime()` The mean time to execute gets.
    `float` | `getAveragePutTime()` The mean time to execute puts.
    `float` | `getAverageRemoveTime()` The mean time to execute removes.
    `float` | `getAverageTxCommitTime()` The mean time to execute tx commit.
    `float` | `getAverageTxRollbackTime()` The mean time to execute tx rollbacks.
    `long` | `getCacheEvictions()` The total number of evictions from the cache.
    `long` | `getCacheGets()` The total number of requests to the cache.
    `float` | `getCacheHitPercentage()` This is a measure of cache efficiency.
    `long` | `getCacheHits()` The number of get requests that were satisfied by the cache.
    `long` | `getCacheMisses()` A miss is a get request that is not satisfied.
    `float` | `getCacheMissPercentage()` Returns the percentage of cache accesses that did not find a requested entry in the cache.
    `long` | `getCachePuts()` The total number of puts to the cache.
    `long` | `getCacheRemovals()` The total number of removals from the cache.
    `long` | `getCacheSize()` Cache size.
    `long` | `getCacheTxCommits()` Gets total number of transaction commits.
    `long` | `getCacheTxRollbacks()` Gets total number of transaction rollbacks.
    `int` | `getDhtEvictQueueCurrentSize()` Deprecated.
    `float` | `getEntryProcessorAverageInvocationTime()` The mean time to execute cache invokes.
    `float` | `getEntryProcessorHitPercentage()` The percentage of invocations on keys, which exist in cache.
    `long` | `getEntryProcessorHits()` The total number of invocations on keys, which exist in cache.
    `long` | `getEntryProcessorInvocations()` The total number of cache invocations.
    `float` | `getEntryProcessorMaxInvocationTime()` So far, the maximum time to execute cache invokes.
    `float` | `getEntryProcessorMinInvocationTime()` So far, the minimum time to execute cache invokes.
    `long` | `getEntryProcessorMisses()` The total number of invocations on keys, which don't exist in cache.
    `float` | `getEntryProcessorMissPercentage()` The percentage of invocations on keys, which don't exist in cache.
    `long` | `getEntryProcessorPuts()` The total number of cache invocations, caused update.
    `long` | `getEntryProcessorReadOnlyInvocations()` The total number of cache invocations, caused no updates.
    `long` | `getEntryProcessorRemovals()` The total number of cache invocations, caused removal.
    `long` | `getEstimatedRebalancingFinishTime()`
    `long` | `getEstimatedRebalancingKeys()`
    `long` | `getHeapEntriesCount()` Gets the number of cache entries in heap memory, including entries held by active transactions, entries in onheap cache and near entries.
    `int` | `getKeySize()` Deprecated. Can overflow. Use `getCacheSize()` instead.
    `long` | `getKeysToRebalanceLeft()`
    `String` | `getKeyType()` Determines the required type of keys for this `Cache`, if any.
    `long` | `getOffHeapAllocatedSize()` Gets memory size allocated in off-heap.
    `long` | `getOffHeapBackupEntriesCount()` Gets number of backup entries stored in off-heap memory.
    `long` | `getOffHeapEntriesCount()` Gets number of entries stored in off-heap memory.
    `long` | `getOffHeapEvictions()` The total number of evictions from the off-heap memory.
    `long` | `getOffHeapGets()` The total number of get requests to the off-heap memory.
    `float` | `getOffHeapHitPercentage()` Gets the percentage of hits on off-heap memory.
    `long` | `getOffHeapHits()` The number of get requests that were satisfied by the off-heap memory.
    `long` | `getOffHeapMisses()` A miss is a get request that is not satisfied by off-heap memory.
    `float` | `getOffHeapMissPercentage()` Gets the percentage of misses on off-heap memory.
    `long` | `getOffHeapPrimaryEntriesCount()` Gets number of primary entries stored in off-heap memory.
    `long` | `getOffHeapPuts()` The total number of put requests to the off-heap memory.
    `long` | `getOffHeapRemovals()` The total number of removals from the off-heap memory.
    `long` | `getRebalanceClearingPartitionsLeft()`
    `long` | `getRebalancedKeys()`
    `long` | `getRebalancingBytesRate()`
    `long` | `getRebalancingKeysRate()`
    `int` | `getRebalancingPartitionsCount()`
    `long` | `getRebalancingStartTime()`
    `int` | `getSize()` Deprecated. Can overflow. Use `getCacheSize()` instead.
    `int` | `getTotalPartitionsCount()`
    `int` | `getTxCommitQueueSize()` Deprecated.
    `int` | `getTxCommittedVersionsSize()` Gets number of cached committed transaction IDs.
    `int` | `getTxDhtCommitQueueSize()` Deprecated.
    `int` | `getTxDhtCommittedVersionsSize()` Gets number of cached committed DHT transaction IDs.
    `int` | `getTxDhtPrepareQueueSize()` Deprecated.
    `int` | `getTxDhtRolledbackVersionsSize()` Gets number of cached rolled back DHT transaction IDs.
    `int` | `getTxDhtStartVersionCountsSize()` Deprecated.
    `int` | `getTxDhtThreadMapSize()` Gets transaction DHT per-thread map size.
    `int` | `getTxDhtXidMapSize()` Gets transaction DHT per-Xid map size.
    `@NotNull String` | `getTxKeyCollisions()` Checks if there were any tx key collisions last time.
    `int` | `getTxPrepareQueueSize()` Deprecated.
    `int` | `getTxRolledbackVersionsSize()` Gets number of cached rolled back transaction IDs.
    `int` | `getTxStartVersionCountsSize()` Deprecated.
    `int` | `getTxThreadMapSize()` Gets transaction per-thread map size.
    `int` | `getTxXidMapSize()` Gets transaction per-Xid map size.
    `String` | `getValueType()` Determines the required type of values for this `Cache`, if any.
    `int` | `getWriteBehindBufferSize()` Gets count of entries that were processed by the write-behind store and have not been flushed to the underlying store yet.
    `int` | `getWriteBehindCriticalOverflowCount()` Gets count of write buffer overflow events in progress at the moment.
    `int` | `getWriteBehindErrorRetryCount()` Gets count of cache entries that are in a store-retry state.
    `long` | `getWriteBehindFlushFrequency()` Gets the cache flush frequency.
    `int` | `getWriteBehindFlushSize()` Gets the maximum size of the write-behind buffer.
    `int` | `getWriteBehindFlushThreadCount()` Gets the number of flush threads that will perform store update operations.
    `int` | `getWriteBehindStoreBatchSize()` Gets the maximum count of similar (put or remove) operations that can be grouped to a single batch.
    `int` | `getWriteBehindTotalCriticalOverflowCount()` Gets count of write buffer overflow events since initialization.
    `boolean` | `isEmpty()` Returns `true` if this cache is empty.
    `boolean` | `isManagementEnabled()` Checks whether management is enabled on this cache.
    `boolean` | `isReadThrough()` Determines if a `Cache` should operate in read-through mode.
    `boolean` | `isStatisticsEnabled()` Checks whether statistics collection is enabled in this cache.
    `boolean` | `isStoreByValue()` Whether storeByValue `true` or storeByReference `false`.
    `boolean` | `isValidForReading()` Checks whether cache topology is valid for read operations.
    `boolean` | `isValidForWriting()` Checks whether cache topology is valid for write operations.
    `boolean` | `isWriteBehindEnabled()` Returns `true` if write-behind is enabled.
    `boolean` | `isWriteThrough()` Determines if a `Cache` should operate in "write-through" mode.
    `String` | `name()` Gets name of this cache.
    `long` | `rebalancingStartTime()` Deprecated.

- - ### Method Detail

    - #### getCacheHits

          long getCacheHits()

      The number of get requests that were satisfied by the cache.
      Returns:
        The number of hits.

    - #### getCacheHitPercentage

          float getCacheHitPercentage()

      This is a measure of cache efficiency.
      Returns:
        The percentage of successful hits, as a decimal e.g 75.

    - #### getCacheMisses

          long getCacheMisses()

      A miss is a get request that is not satisfied.
      Returns:
        The number of misses.

    - #### getCacheMissPercentage

          float getCacheMissPercentage()

      Returns the percentage of cache accesses that did not find a requested entry in the cache.
      Returns:
        The percentage of accesses that failed to find anything.

    - #### getCacheGets

          long getCacheGets()

      The total number of requests to the cache. This will be equal to the sum of the hits and misses.
      Returns:
        The number of gets.

    - #### getCachePuts

          long getCachePuts()

      The total number of puts to the cache.
      Returns:
        The number of puts.

    - #### getEntryProcessorPuts

          long getEntryProcessorPuts()

      The total number of cache invocations, caused update.
      Returns:
        The number of invocation updates.

    - #### getEntryProcessorRemovals

          long getEntryProcessorRemovals()

      The total number of cache invocations, caused removal.
      Returns:
        The number of invocation removals.

    - #### getEntryProcessorReadOnlyInvocations

          long getEntryProcessorReadOnlyInvocations()

      The total number of cache invocations, caused no updates.
      Returns:
        The number of read-only invocations.

    - #### getEntryProcessorInvocations

          long getEntryProcessorInvocations()

      The total number of cache invocations.
      Returns:
        The number of cache invocations.

    - #### getEntryProcessorHits

          long getEntryProcessorHits()

      The total number of invocations on keys, which exist in cache.
      Returns:
        The number of cache invocation hits.

    - #### getEntryProcessorHitPercentage

          float getEntryProcessorHitPercentage()

      The percentage of invocations on keys, which exist in cache.
      Returns:
        The percentage of successful invocation hits.

    - #### getEntryProcessorMisses

          long getEntryProcessorMisses()

      The total number of invocations on keys, which don't exist in cache.
      Returns:
        The number of cache invocation misses.

    - #### getEntryProcessorMissPercentage

          float getEntryProcessorMissPercentage()

      The percentage of invocations on keys, which don't exist in cache.
      Returns:
        The percentage of invocation misses.

    - #### getEntryProcessorAverageInvocationTime

          float getEntryProcessorAverageInvocationTime()

      The mean time to execute cache invokes.
      Returns:
        The time in µs.

    - #### getEntryProcessorMinInvocationTime

          float getEntryProcessorMinInvocationTime()

      So far, the minimum time to execute cache invokes.
      Returns:
        The time in µs.

    - #### getEntryProcessorMaxInvocationTime

          float getEntryProcessorMaxInvocationTime()

      So far, the maximum time to execute cache invokes.
      Returns:
        The time in µs.

    - #### getCacheRemovals

          long getCacheRemovals()

      The total number of removals from the cache. This does not include evictions, where the cache itself initiates the removal to make space.
      Returns:
        The number of removals.

    - #### getCacheEvictions

          long getCacheEvictions()

      The total number of evictions from the cache. An eviction is a removal initiated by the cache itself to free up space. An eviction is not treated as a removal and does not appear in the removal counts.
      Returns:
        The number of evictions.

    - #### getAverageGetTime

          float getAverageGetTime()

      The mean time to execute gets.
      Returns:
        The time in µs.

    - #### getAveragePutTime

          float getAveragePutTime()

      The mean time to execute puts.
      Returns:
        The time in µs.

    - #### getAverageRemoveTime

          float getAverageRemoveTime()

      The mean time to execute removes.
      Returns:
        The time in µs.

    - #### getAverageTxCommitTime

          float getAverageTxCommitTime()

      The mean time to execute tx commit.
      Returns:
        The time in µs.

    - #### getAverageTxRollbackTime

          float getAverageTxRollbackTime()

      The mean time to execute tx rollbacks.
      Returns:
        Number of transaction rollbacks.

    - #### getCacheTxCommits

          long getCacheTxCommits()

      Gets total number of transaction commits.
      Returns:
        Number of transaction commits.

    - #### getCacheTxRollbacks

          long getCacheTxRollbacks()

      Gets total number of transaction rollbacks.
      Returns:
        Number of transaction rollbacks.

    - #### name

          String name()

      Gets name of this cache.
      Returns:
        Cache name.

    - #### getOffHeapGets

          long getOffHeapGets()

      The total number of get requests to the off-heap memory.
      Returns:
        The number of gets.

    - #### getOffHeapPuts

          long getOffHeapPuts()

      The total number of put requests to the off-heap memory.
      Returns:
        The number of puts.

    - #### getOffHeapRemovals

          long getOffHeapRemovals()

      The total number of removals from the off-heap memory. This does not include evictions.
      Returns:
        The number of removals.

    - #### getOffHeapEvictions

          long getOffHeapEvictions()

      The total number of evictions from the off-heap memory.
      Returns:
        The number of evictions.

    - #### getOffHeapHits

          long getOffHeapHits()

      The number of get requests that were satisfied by the off-heap memory.
      Returns:
        The off-heap hits number.

    - #### getOffHeapHitPercentage

          float getOffHeapHitPercentage()

      Gets the percentage of hits on off-heap memory.
      Returns:
        The percentage of hits on off-heap memory.

    - #### getOffHeapMisses

          long getOffHeapMisses()

      A miss is a get request that is not satisfied by off-heap memory.
      Returns:
        The off-heap misses number.

    - #### getOffHeapMissPercentage

          float getOffHeapMissPercentage()

      Gets the percentage of misses on off-heap memory.
      Returns:
        The percentage of misses on off-heap memory.

    - #### getHeapEntriesCount

          long getHeapEntriesCount()

      Gets the number of cache entries in heap memory, including entries held by active transactions, entries in onheap cache and near entries.
      Returns:
        Number of entries in heap memory.

    - #### getOffHeapEntriesCount

          long getOffHeapEntriesCount()

      Gets number of entries stored in off-heap memory.
      Returns:
        Number of entries stored in off-heap memory.

    - #### getOffHeapPrimaryEntriesCount

          long getOffHeapPrimaryEntriesCount()

      Gets number of primary entries stored in off-heap memory.
      Returns:
        Number of primary entries stored in off-heap memory.

    - #### getOffHeapBackupEntriesCount

          long getOffHeapBackupEntriesCount()

      Gets number of backup entries stored in off-heap memory.
      Returns:
        Number of backup entries stored in off-heap memory.

    - #### getOffHeapAllocatedSize

          long getOffHeapAllocatedSize()

      Gets memory size allocated in off-heap.
      Returns:
        Memory size allocated in off-heap.

    - #### getSize

          @Deprecated
          int getSize()

      Deprecated. Can overflow. Use `getCacheSize()` instead.
      Gets number of non-`null` values in the cache. Note this method will always return `0`
      Returns:
        Number of non-`null` values in the cache.

    - #### getCacheSize

          long getCacheSize()

      Cache size.
      Returns:
        Cache size.

    - #### getKeySize

          @Deprecated
          int getKeySize()

      Deprecated. Can overflow. Use `getCacheSize()` instead.
      Gets number of keys in the cache, possibly with `null` values. Note this method will always return `0`
      Returns:
        Number of keys in the cache.

    - #### isEmpty

          boolean isEmpty()

      Returns `true` if this cache is empty.
      Returns:
        `True` if this cache is empty.

    - #### getDhtEvictQueueCurrentSize

          @Deprecated
          int getDhtEvictQueueCurrentSize()

      Deprecated.
      Gets current size of evict queue used to batch up evictions.
      Returns:
        Current size of evict queue.

    - #### getTxThreadMapSize

          int getTxThreadMapSize()

      Gets transaction per-thread map size.
      Returns:
        Thread map size.

    - #### getTxXidMapSize

          int getTxXidMapSize()

      Gets transaction per-Xid map size.
      Returns:
        Transaction per-Xid map size.

    - #### getTxCommitQueueSize

          @Deprecated
          int getTxCommitQueueSize()

      Deprecated.
      Gets committed transaction queue size.
      Returns:
        Committed transaction queue size.

    - #### getTxPrepareQueueSize

          @Deprecated
          int getTxPrepareQueueSize()

      Deprecated.
      Gets prepared transaction queue size.
      Returns:
        Prepared transaction queue size.

    - #### getTxStartVersionCountsSize

          @Deprecated
          int getTxStartVersionCountsSize()

      Deprecated.
      Gets start version counts map size.
      Returns:
        Start version counts map size.

    - #### getTxCommittedVersionsSize

          int getTxCommittedVersionsSize()

      Gets number of cached committed transaction IDs.
      Returns:
        Number of cached committed transaction IDs.

    - #### getTxRolledbackVersionsSize

          int getTxRolledbackVersionsSize()

      Gets number of cached rolled back transaction IDs.
      Returns:
        Number of cached rolled back transaction IDs.

    - #### getTxDhtThreadMapSize

          int getTxDhtThreadMapSize()

      Gets transaction DHT per-thread map size.
      Returns:
        DHT thread map size.

    - #### getTxDhtXidMapSize

          int getTxDhtXidMapSize()

      Gets transaction DHT per-Xid map size.
      Returns:
        Transaction DHT per-Xid map size.

    - #### getTxDhtCommitQueueSize

          @Deprecated
          int getTxDhtCommitQueueSize()

      Deprecated.
      Gets committed DHT transaction queue size.
      Returns:
        Committed DHT transaction queue size.

    - #### getTxDhtPrepareQueueSize

          @Deprecated
          int getTxDhtPrepareQueueSize()

      Deprecated.
      Gets prepared DHT transaction queue size.
      Returns:
        Prepared DHT transaction queue size.

    - #### getTxDhtStartVersionCountsSize

          @Deprecated
          int getTxDhtStartVersionCountsSize()

      Deprecated.
      Gets DHT start version counts map size.
      Returns:
        DHT start version counts map size.

    - #### getTxDhtCommittedVersionsSize

          int getTxDhtCommittedVersionsSize()

      Gets number of cached committed DHT transaction IDs.
      Returns:
        Number of cached committed DHT transaction IDs.

    - #### getTxDhtRolledbackVersionsSize

          int getTxDhtRolledbackVersionsSize()

      Gets number of cached rolled back DHT transaction IDs.
      Returns:
        Number of cached rolled back DHT transaction IDs.

    - #### isWriteBehindEnabled

          boolean isWriteBehindEnabled()

      Returns `true` if write-behind is enabled.
      Returns:
        `True` if write-behind is enabled.

    - #### getWriteBehindFlushSize

          int getWriteBehindFlushSize()

      Gets the maximum size of the write-behind buffer. When the count of unique keys in write buffer exceeds this value, the buffer is scheduled for write to the underlying store.

      If this value is `0`, then flush is performed only on time-elapsing basis. However, when this value is `0`, the cache critical size is set to `CacheConfiguration.DFLT_WRITE_BEHIND_CRITICAL_SIZE`
      Returns:
        Buffer size that triggers flush procedure.

    - #### getWriteBehindFlushThreadCount

          int getWriteBehindFlushThreadCount()

      Gets the number of flush threads that will perform store update operations.
      Returns:
        Count of worker threads.

    - #### getWriteBehindFlushFrequency

          long getWriteBehindFlushFrequency()

      Gets the cache flush frequency. All pending operations on the underlying store will be performed within time interval not less then this value.

      If this value is `0`, then flush is performed only when buffer size exceeds flush size.
      Returns:
        Flush frequency in milliseconds.

    - #### getWriteBehindStoreBatchSize

          int getWriteBehindStoreBatchSize()

      Gets the maximum count of similar (put or remove) operations that can be grouped to a single batch.
      Returns:
        Maximum size of batch.

    - #### getWriteBehindTotalCriticalOverflowCount

          int getWriteBehindTotalCriticalOverflowCount()

      Gets count of write buffer overflow events since initialization. Each overflow event causes the ongoing flush operation to be performed synchronously.
      Returns:
        Count of cache overflow events since start.

    - #### getWriteBehindCriticalOverflowCount

          int getWriteBehindCriticalOverflowCount()

      Gets count of write buffer overflow events in progress at the moment. Each overflow event causes the ongoing flush operation to be performed synchronously.
      Returns:
        Count of cache overflow events since start.

    - #### getWriteBehindErrorRetryCount

          int getWriteBehindErrorRetryCount()

      Gets count of cache entries that are in a store-retry state. An entry is assigned a store-retry state when underlying store failed due some reason and cache has enough space to retain this entry till the next try.
      Returns:
        Count of entries in store-retry state.

    - #### getWriteBehindBufferSize

          int getWriteBehindBufferSize()

      Gets count of entries that were processed by the write-behind store and have not been flushed to the underlying store yet.
      Returns:
        Total count of entries in cache store internal buffer.

    - #### getKeyType

          String getKeyType()

      Determines the required type of keys for this `Cache`, if any.
      Returns:
        The fully qualified class name of the key type, or `"java.lang.Object"` if the type is undefined.

    - #### getValueType

          String getValueType()

      Determines the required type of values for this `Cache`, if any.
      Returns:
        The fully qualified class name of the value type, or `"java.lang.Object"` if the type is undefined.

    - #### isStoreByValue

          boolean isStoreByValue()

      Whether storeByValue `true` or storeByReference `false`. When `true`, both keys and values are stored by value.

      When `false`, both keys and values are stored by reference. Caches stored by reference are capable of mutation by any threads holding the reference. The effects are:

      - if the key is mutated, then the key may not be retrievable or removable
      - if the value is mutated, then all threads in the JVM can potentially observe those mutations, subject to the normal Java Memory Model rules.
      Storage by reference only applies to the local heap. If an entry is moved off heap it will need to be transformed into a representation. Any mutations that occur after transformation may not be reflected in the cache.

      When a cache is storeByValue, any mutation to the key or value does not affect the key of value stored in the cache.

      The default value is `true`.

      Returns:
        `True` if the cache is store by value.

    - #### getTotalPartitionsCount

          int getTotalPartitionsCount()

      Returns:
        Total number of partitions on current node.

    - #### getRebalancingPartitionsCount

          int getRebalancingPartitionsCount()

      Returns:
        Number of currently rebalancing partitions on current node.

    - #### getRebalancedKeys

          long getRebalancedKeys()

      Returns:
        Number of already rebalanced keys.

    - #### getEstimatedRebalancingKeys

          long getEstimatedRebalancingKeys()

      Returns:
        Number estimated to rebalance keys.

    - #### getKeysToRebalanceLeft

          long getKeysToRebalanceLeft()

      Returns:
        Estimated number of keys to be rebalanced on current node.

    - #### getRebalancingKeysRate

          long getRebalancingKeysRate()

      Returns:
        Estimated rebalancing speed in keys.

    - #### getRebalancingBytesRate

          long getRebalancingBytesRate()

      Returns:
        Estimated rebalancing speed in bytes.

    - #### estimateRebalancingFinishTime

          @Deprecated
          long estimateRebalancingFinishTime()

      Deprecated.
      This method is deprecated and will be deleted in future major release. Use `getEstimatedRebalancingFinishTime()` instead.
      Returns:
        Estimated rebalancing finished time.

    - #### rebalancingStartTime

          @Deprecated
          long rebalancingStartTime()

      Deprecated.
      This method is deprecated and will be deleted in future major release. Use `getRebalancingStartTime()` instead.
      Returns:
        Rebalancing start time.

    - #### getEstimatedRebalancingFinishTime

          long getEstimatedRebalancingFinishTime()

      Returns:
        Estimated rebalancing finish time.

    - #### getRebalancingStartTime

          long getRebalancingStartTime()

      Returns:
        Rebalancing start time.

    - #### getRebalanceClearingPartitionsLeft

          long getRebalanceClearingPartitionsLeft()

      Returns:
        Number of partitions need to be cleared before actual rebalance start.

    - #### isStatisticsEnabled

          boolean isStatisticsEnabled()

      Checks whether statistics collection is enabled in this cache.

      The default value is `false`.

      Returns:
        `True` if statistics collection is enabled.

    - #### isManagementEnabled

          boolean isManagementEnabled()

      Checks whether management is enabled on this cache.

      The default value is `false`.

      Returns:
        `true` if management is enabled.

    - #### isReadThrough

          boolean isReadThrough()

      Determines if a `Cache` should operate in read-through mode.

      The default value is `false`

      Returns:
        `True` when a `Cache` is in "read-through" mode.
      See Also:
        `CacheLoader`

    - #### isWriteThrough

          boolean isWriteThrough()

      Determines if a `Cache` should operate in "write-through" mode.

      will appropriately cause the configured `CacheWriter` to be invoked.

      The default value is `false`

      Returns:
        `True` when a `Cache` is in "write-through" mode.
      See Also:
        `CacheWriter`

    - #### isValidForReading

          boolean isValidForReading()

      Checks whether cache topology is valid for read operations.

      Note: the method will return `false` if any partition was lost despite the fact others can be awailable for reading.

      Returns:
        `true` when cache topology is valid for reading.

    - #### isValidForWriting

          boolean isValidForWriting()

      Checks whether cache topology is valid for write operations.

      Note: the method will return `false` if any partition was lost despite the fact others can be awailable for writing according to configured partition loss policy.

      Returns:
        `true` when cache topology is valid for writing.

    - #### getTxKeyCollisions

          @NotNull
          @NotNull String getTxKeyCollisions()

      Checks if there were any tx key collisions last time. Interval for check specified throught: `IgniteSystemProperties.IGNITE_DUMP_TX_COLLISIONS_INTERVAL` or `TransactionsMXBean.setTxKeyCollisionsInterval(int)`.
      Returns:
        Key collisions and appropriate queue size string representation.

2020 Copyright © Apache Software Foundation
| Follow @ApacheIgnite
Ignite Database and Caching Platform | : ver. 2.9.1
Release Date | : December 9 2020