mikewalch commented on a change in pull request #549: ACCUMULO-4074 Added support for multiple scan executors URL: https://github.com/apache/accumulo/pull/549#discussion_r200717110
########## File path: core/src/main/java/org/apache/accumulo/core/spi/scan/ScanInfo.java ########## @@ -0,0 +1,107 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.accumulo.core.spi.scan; + +import java.util.Collection; +import java.util.OptionalLong; +import java.util.Set; + +import org.apache.accumulo.core.data.Column; +import org.apache.accumulo.core.spi.common.IteratorConfiguration; +import org.apache.accumulo.core.spi.common.Stats; + +/** + * Provides information about an active Accumulo scan against a tablet. Accumulo scans operate by + * repeatedly gathering batches of data and returning those to the client. + * + * <p> + * All times are in milliseconds and obtained using System.currentTimeMillis(). + * + * @since 2.0.0 + */ +public interface ScanInfo { + + enum Type { + SINGLE, MULTI + } + + Type getScanType(); + + String getTableId(); + + /** + * Returns the first time a tablet knew about a scan over its portion of data. + */ + long getCreationTime(); + + /** + * If the scan has run, returns the last run time. + */ + OptionalLong getLastRunTime(); + + /** + * Returns timing statistics about running and gathering a batches of data. Review comment: Could provide an overview about run/idle time in user manual ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected] With regards, Apache Git Services
