mynameborat commented on a change in pull request #1413: URL: https://github.com/apache/samza/pull/1413#discussion_r471583711
########## File path: samza-api/src/main/java/org/apache/samza/system/BoundedSSPIterator.java ########## @@ -0,0 +1,84 @@ +/* + * 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.samza.system; + +import java.util.ArrayDeque; +import java.util.HashSet; +import java.util.List; +import java.util.Map; +import java.util.NoSuchElementException; +import java.util.Queue; +import java.util.Set; +import org.apache.samza.SamzaException; + +/** + * Iterates over messages in the provided changelog {@link SystemStreamPartition} using the provided Review comment: s/changelog/input|topic ########## File path: samza-api/src/test/java/org/apache/samza/system/TestBoundedSSPIterator.java ########## @@ -0,0 +1,118 @@ +/* + * 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.samza.system; + +import com.google.common.collect.ImmutableList; +import com.google.common.collect.ImmutableMap; +import java.util.List; +import java.util.Map; +import java.util.NoSuchElementException; +import org.apache.samza.Partition; +import org.junit.Assert; +import org.junit.Test; +import org.mockito.stubbing.OngoingStubbing; + +import static org.mockito.Mockito.*; Review comment: nit: can we change this to non-star imports? ########## File path: samza-api/src/main/java/org/apache/samza/system/BoundedSSPIterator.java ########## @@ -0,0 +1,84 @@ +/* + * 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.samza.system; + +import java.util.ArrayDeque; +import java.util.HashSet; +import java.util.List; +import java.util.Map; +import java.util.NoSuchElementException; +import java.util.Queue; +import java.util.Set; +import org.apache.samza.SamzaException; + +/** + * Iterates over messages in the provided changelog {@link SystemStreamPartition} using the provided + * {@link SystemConsumer} until all messages with offsets up to and including the bound offset have been consumed. + */ +public class BoundedSSPIterator { + + protected final SystemAdmin admin; + + private final SystemConsumer systemConsumer; + private final String endOffset; + private final Set<SystemStreamPartition> fetchSet; + private Queue<IncomingMessageEnvelope> peeks; + + public BoundedSSPIterator(SystemConsumer systemConsumer, + SystemStreamPartition systemStreamPartition, String endOffset, SystemAdmin admin) { + this.systemConsumer = systemConsumer; + this.endOffset = endOffset; + this.admin = admin; + this.fetchSet = new HashSet<>(); + this.fetchSet.add(systemStreamPartition); Review comment: looks like it only allows feeding one SSP. why do we need a set? ########## File path: samza-api/src/main/java/org/apache/samza/system/BoundedSSPIterator.java ########## @@ -0,0 +1,84 @@ +/* + * 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.samza.system; + +import java.util.ArrayDeque; +import java.util.HashSet; +import java.util.List; +import java.util.Map; +import java.util.NoSuchElementException; +import java.util.Queue; +import java.util.Set; +import org.apache.samza.SamzaException; + +/** + * Iterates over messages in the provided changelog {@link SystemStreamPartition} using the provided + * {@link SystemConsumer} until all messages with offsets up to and including the bound offset have been consumed. + */ +public class BoundedSSPIterator { + + protected final SystemAdmin admin; + + private final SystemConsumer systemConsumer; + private final String endOffset; + private final Set<SystemStreamPartition> fetchSet; + private Queue<IncomingMessageEnvelope> peeks; + + public BoundedSSPIterator(SystemConsumer systemConsumer, + SystemStreamPartition systemStreamPartition, String endOffset, SystemAdmin admin) { + this.systemConsumer = systemConsumer; + this.endOffset = endOffset; + this.admin = admin; + this.fetchSet = new HashSet<>(); + this.fetchSet.add(systemStreamPartition); + this.peeks = new ArrayDeque<>(); + } + + public boolean hasNext() { + refresh(); + + return peeks.size() > 0 && (endOffset == null || admin.offsetComparator(peeks.peek().getOffset(), endOffset) <= 0); Review comment: Can we add a pre-check on the `endOffset` as not `null` in the constructor? Or, do you intend have this as a `UnBoundedSSPIterator` in the event no `endOffset`? If latter, please update the java docs to reflect the contract. ########## File path: samza-api/src/main/java/org/apache/samza/system/BoundedSSPIterator.java ########## @@ -0,0 +1,84 @@ +/* + * 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.samza.system; + +import java.util.ArrayDeque; +import java.util.HashSet; +import java.util.List; +import java.util.Map; +import java.util.NoSuchElementException; +import java.util.Queue; +import java.util.Set; +import org.apache.samza.SamzaException; + +/** + * Iterates over messages in the provided changelog {@link SystemStreamPartition} using the provided + * {@link SystemConsumer} until all messages with offsets up to and including the bound offset have been consumed. + */ +public class BoundedSSPIterator { + + protected final SystemAdmin admin; + + private final SystemConsumer systemConsumer; + private final String endOffset; + private final Set<SystemStreamPartition> fetchSet; Review comment: nit: group final fields together. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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