Examples with ContainerKeyPrefix org.apache.hadoop.ozone.recon.api.types.ContainerKeyPrefix used on opensource projects

Example 16 with ContainerKeyPrefix

use of org.apache.hadoop.ozone.recon.api.types.ContainerKeyPrefix in project ozone by apache.

the class ContainerKeyMapperTask method deleteOMKeyFromContainerDB.

/**
 * Delete an OM Key from Container DB and update containerID -> no. of keys
 * count.
 *
 * @param key key String.
 * @throws IOException If Unable to write to container DB.
 */
private void deleteOMKeyFromContainerDB(String key) throws IOException {
    TableIterator<ContainerKeyPrefix, ? extends Table.KeyValue<ContainerKeyPrefix, Integer>> containerIterator = reconContainerMetadataManager.getContainerTableIterator();
    Set<ContainerKeyPrefix> keysToBeDeleted = new HashSet<>();
    while (containerIterator.hasNext()) {
        Table.KeyValue<ContainerKeyPrefix, Integer> keyValue = containerIterator.next();
        String keyPrefix = keyValue.getKey().getKeyPrefix();
        if (keyPrefix.equals(key)) {
            keysToBeDeleted.add(keyValue.getKey());
        }
    }
    for (ContainerKeyPrefix containerKeyPrefix : keysToBeDeleted) {
        reconContainerMetadataManager.deleteContainerMapping(containerKeyPrefix);
        // decrement count and update containerKeyCount.
        Long containerID = containerKeyPrefix.getContainerId();
        long keyCount = reconContainerMetadataManager.getKeyCountForContainer(containerID);
        if (keyCount > 0) {
            reconContainerMetadataManager.storeContainerKeyCount(containerID, --keyCount);
        }
    }
}