agura commented on a change in pull request #105: URL: https://github.com/apache/ignite-3/pull/105#discussion_r619309830
########## File path: modules/vault/src/main/java/org/apache/ignite/internal/vault/common/VaultWatch.java ########## @@ -0,0 +1,85 @@ +/* + * 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.ignite.internal.vault.common; + +import java.util.Comparator; +import org.apache.ignite.lang.ByteArray; +import org.jetbrains.annotations.Nullable; + +/** + * Watch for vault entries. + * Could be specified by range of keys. + * If value of key in range is changed, then corresponding listener will be triggered. + */ +public class VaultWatch { + /** Comparator for {@code ByteArray} values. */ + private static final Comparator<ByteArray> CMP = ByteArray::compare; + + /** Start key of range (inclusive) */ + @Nullable + private ByteArray startKey; + + /** End key of range (inclusive) */ + @Nullable + private ByteArray endKey; + + /** Listener for vault's values updates. */ + private VaultListener listener; + + /** + * @param listener Listener. + */ + public VaultWatch(VaultListener listener) { + this.listener = listener; + } + + /** + * Start key of range (inclusive). + * If value of key in range is changed, then corresponding listener will be triggered. + * + * @param startKey Start key represented as {@code ByteArray}. + */ + public void startKey(ByteArray startKey) { + this.startKey = startKey; + } + + /** + * Start key of range (inclusive). + * If value of key in range is changed, then corresponding listener will be triggered. + * + * @param endKey End key represented as {@code ByteArray}. + */ + public void endKey(ByteArray endKey) { + this.endKey = endKey; + } + + /** + * Notifies specified listener if {@code val} of key in range was changed. + * + * @param val Vault entry. + */ + public void notify(VaultEntry val) { + if (startKey != null && CMP.compare(val.key(), startKey) < 0) Review comment: `<=` because inclusive. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected]
