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ASF GitHub Bot commented on CASSANDRA-7622: ------------------------------------------- Github user zznate commented on a diff in the pull request: https://github.com/apache/cassandra/pull/205#discussion_r173965027 --- Diff: src/java/org/apache/cassandra/db/virtual/TableStats.java --- @@ -0,0 +1,166 @@ +package org.apache.cassandra.db.virtual; + +import java.lang.reflect.Field; +import java.lang.reflect.Modifier; +import java.nio.ByteBuffer; +import java.util.*; + +import org.apache.cassandra.cql3.CQL3Type; +import org.apache.cassandra.cql3.QueryOptions; +import org.apache.cassandra.cql3.restrictions.StatementRestrictions; +import org.apache.cassandra.db.ColumnFamilyStore; +import org.apache.cassandra.db.InMemoryVirtualTable; +import org.apache.cassandra.db.marshal.CompositeType; +import org.apache.cassandra.metrics.LatencyMetrics; +import org.apache.cassandra.schema.TableMetadata; +import org.apache.cassandra.utils.EstimatedHistogram; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import com.codahale.metrics.Counting; +import com.codahale.metrics.Gauge; +import com.codahale.metrics.Metric; +import com.codahale.metrics.Sampling; +import com.codahale.metrics.Snapshot; +import com.codahale.metrics.Timer; +import com.google.common.collect.ImmutableSet; + +public class TableStats extends InMemoryVirtualTable +{ + private static final Logger logger = LoggerFactory.getLogger(TableStats.class); + private static final Field[] FIELDS = org.apache.cassandra.metrics.TableMetrics.class.getFields(); + static + { + Arrays.sort(FIELDS, Comparator.comparing(Field::getName)); + } + private static final Collection<String> EH_GAUGES = ImmutableSet.of( + "estimatedPartitionSizeHistogram", + "estimatedColumnCountHistogram"); + private CompositeType keyType; + + public static Map<String, CQL3Type> columns() --- End diff -- same as above. Initialize statically. > Implement virtual tables > ------------------------ > > Key: CASSANDRA-7622 > URL: https://issues.apache.org/jira/browse/CASSANDRA-7622 > Project: Cassandra > Issue Type: Improvement > Reporter: Tupshin Harper > Assignee: Chris Lohfink > Priority: Major > Fix For: 4.x > > > There are a variety of reasons to want virtual tables, which would be any > table that would be backed by an API, rather than data explicitly managed and > stored as sstables. > One possible use case would be to expose JMX data through CQL as a > resurrection of CASSANDRA-3527. > Another is a more general framework to implement the ability to expose yaml > configuration information. So it would be an alternate approach to > CASSANDRA-7370. > A possible implementation would be in terms of CASSANDRA-7443, but I am not > presupposing. -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@cassandra.apache.org For additional commands, e-mail: commits-h...@cassandra.apache.org