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98 changes: 98 additions & 0 deletions
98
...loud-platform/src/main/java/org/apache/beam/sdk/io/gcp/spanner/MutationSizeEstimator.java
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| @@ -0,0 +1,98 @@ | ||
| /* | ||
| * 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 | ||
| * | ||
| * https://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.beam.sdk.io.gcp.spanner; | ||
|
|
||
| import com.google.cloud.ByteArray; | ||
| import com.google.cloud.spanner.Mutation; | ||
| import com.google.cloud.spanner.Value; | ||
|
|
||
| /** Estimates the logical size of {@link com.google.cloud.spanner.Mutation}. */ | ||
| class MutationSizeEstimator { | ||
|
|
||
| // Prevent construction. | ||
| private MutationSizeEstimator() {} | ||
|
|
||
| /** Estimates a size of mutation in bytes. */ | ||
| static long sizeOf(Mutation m) { | ||
| long result = 0; | ||
| for (Value v : m.getValues()) { | ||
| switch (v.getType().getCode()) { | ||
| case ARRAY: | ||
| result += estimateArrayValue(v); | ||
| break; | ||
| case STRUCT: | ||
| throw new IllegalArgumentException("Structs are not supported in mutation."); | ||
| default: | ||
| result += estimatePrimitiveValue(v); | ||
| } | ||
| } | ||
| return result; | ||
| } | ||
|
|
||
| private static long estimatePrimitiveValue(Value v) { | ||
| switch (v.getType().getCode()) { | ||
| case BOOL: | ||
| return 1; | ||
| case INT64: | ||
| case FLOAT64: | ||
| return 8; | ||
| case DATE: | ||
| case TIMESTAMP: | ||
| return 12; | ||
| case STRING: | ||
| return v.isNull() ? 0 : v.getString().length(); | ||
| case BYTES: | ||
| return v.isNull() ? 0 : v.getBytes().length(); | ||
| } | ||
| throw new IllegalArgumentException("Unsupported type " + v.getType()); | ||
| } | ||
|
|
||
| private static long estimateArrayValue(Value v) { | ||
| switch (v.getType().getArrayElementType().getCode()) { | ||
| case BOOL: | ||
| return v.getBoolArray().size(); | ||
| case INT64: | ||
| return 8 * v.getInt64Array().size(); | ||
| case FLOAT64: | ||
| return 8 * v.getFloat64Array().size(); | ||
| case STRING: | ||
| long totalLength = 0; | ||
| for (String s : v.getStringArray()) { | ||
| if (s == null) { | ||
| continue; | ||
| } | ||
| totalLength += s.length(); | ||
| } | ||
| return totalLength; | ||
| case BYTES: | ||
| totalLength = 0; | ||
| for (ByteArray bytes : v.getBytesArray()) { | ||
| if (bytes == null) { | ||
| continue; | ||
| } | ||
| totalLength += bytes.length(); | ||
| } | ||
| return totalLength; | ||
| case DATE: | ||
| return 12 * v.getDateArray().size(); | ||
| case TIMESTAMP: | ||
| return 12 * v.getTimestampArray().size(); | ||
| } | ||
| throw new IllegalArgumentException("Unsupported type " + v.getType()); | ||
| } | ||
| } |
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