HADOOP-16118. S3Guard to support on-demand DDB tables. #647
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| @@ -0,0 +1,108 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
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| package org.apache.hadoop.fs.s3a.s3guard; | ||
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| import java.util.Map; | ||
| import java.util.Objects; | ||
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| import org.junit.Assert; | ||
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| import static org.apache.hadoop.fs.s3a.s3guard.DynamoDBMetadataStore.READ_CAPACITY; | ||
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| class DDBCapacities { | ||
| private final long read, write; | ||
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| DDBCapacities(long read, long write) { | ||
| this.read = read; | ||
| this.write = write; | ||
| } | ||
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| public long getRead() { | ||
| return read; | ||
| } | ||
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| public long getWrite() { | ||
| return write; | ||
| } | ||
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| String getReadStr() { | ||
| return Long.toString(read); | ||
| } | ||
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| String getWriteStr() { | ||
| return Long.toString(write); | ||
| } | ||
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| void checkEquals(String text, DDBCapacities that) throws Exception { | ||
| if (!this.equals(that)) { | ||
| throw new Exception(text + " expected = " + this +"; actual = "+ that); | ||
| } | ||
| } | ||
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| @Override | ||
| public boolean equals(Object o) { | ||
| if (this == o) { | ||
| return true; | ||
| } | ||
| if (o == null || getClass() != o.getClass()) { | ||
| return false; | ||
| } | ||
| DDBCapacities that = (DDBCapacities) o; | ||
| return read == that.read && write == that.write; | ||
| } | ||
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| @Override | ||
| public int hashCode() { | ||
| return Objects.hash(read, write); | ||
| } | ||
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| @Override | ||
| public String toString() { | ||
| final StringBuilder sb = new StringBuilder("Capacities{"); | ||
| sb.append("read=").append(read); | ||
| sb.append(", write=").append(write); | ||
| sb.append('}'); | ||
| return sb.toString(); | ||
| } | ||
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| /** | ||
| * Is the the capacity that of a pay-on-demand table? | ||
| * @return true if the capacities are both 0. | ||
| */ | ||
| public boolean isOnDemandTable() { | ||
| return read == 0 && write == 0; | ||
| } | ||
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| /** | ||
| * Given a diagnostics map from a DDB store, extract the capacities. | ||
| * @param diagnostics diagnostics map to examine. | ||
| * @return the capacities | ||
| * @throws AssertionError if the fields are missing. | ||
| */ | ||
| public static DDBCapacities extractCapacities( | ||
| final Map<String, String> diagnostics) { | ||
| String read = diagnostics.get(READ_CAPACITY); | ||
| Assert.assertNotNull("No " + READ_CAPACITY + " attribute in diagnostics", | ||
| read); | ||
| return new DDBCapacities( | ||
| Long.parseLong(read), | ||
| Long.parseLong(diagnostics.get(DynamoDBMetadataStore.WRITE_CAPACITY))); | ||
| } | ||
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| } |
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