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BatchStats.java
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/
BatchStats.java
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/*
* Copyright 2019 Google LLC
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation
* /or other materials provided with the
* distribution.
* * Neither the name of Google LLC nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.google.api.gax.batching;
import com.google.api.core.ApiFutureCallback;
import com.google.api.gax.rpc.ApiException;
import com.google.api.gax.rpc.StatusCode;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.atomic.AtomicInteger;
import javax.annotation.Nullable;
/**
* This class keeps the statistics about failed operations(both at RPC and ElementT level) in {@link
* Batcher}. This provides the count of individual exception failure and count of each failed {@link
* StatusCode.Code} occurred in the batching process.
*/
class BatchStats {
private final Map<Class, AtomicInteger> requestExceptionCounts = new ConcurrentHashMap<>();
private final Map<StatusCode.Code, AtomicInteger> requestStatusCounts = new ConcurrentHashMap<>();
private final AtomicInteger partialBatchFailures = new AtomicInteger(0);
private final Map<Class, AtomicInteger> entryExceptionCounts = new ConcurrentHashMap<>();
private final Map<StatusCode.Code, AtomicInteger> entryStatusCounts = new ConcurrentHashMap<>();
private final Object errorLock = new Object();
private final Object statusLock = new Object();
<T> ApiFutureCallback<T> getRequestCallback() {
return new ApiFutureCallback<T>() {
public void onFailure(Throwable t) {
recordRequestException(t);
}
@Override
public void onSuccess(T result) {}
};
}
<T> ApiFutureCallback<T> getEntryCallback() {
return new ApiFutureCallback<T>() {
public void onFailure(Throwable t) {
recordEntryException(t);
}
@Override
public void onSuccess(T result) {}
};
}
private void recordRequestException(Throwable throwable) {
Class exceptionClass = throwable.getClass();
if (throwable instanceof ApiException) {
StatusCode.Code code = ((ApiException) throwable).getStatusCode().getCode();
exceptionClass = ApiException.class;
synchronized (statusLock) {
if (requestStatusCounts.containsKey(code)) {
requestStatusCounts.get(code).incrementAndGet();
} else {
requestStatusCounts.put(code, new AtomicInteger(1));
}
}
}
synchronized (errorLock) {
if (requestExceptionCounts.containsKey(exceptionClass)) {
requestExceptionCounts.get(exceptionClass).incrementAndGet();
} else {
synchronized (errorLock) {
requestExceptionCounts.put(exceptionClass, new AtomicInteger(1));
}
}
}
}
private void recordEntryException(Throwable throwable) {
Class exceptionClass = throwable.getClass();
if (throwable instanceof ApiException) {
StatusCode.Code code = ((ApiException) throwable).getStatusCode().getCode();
exceptionClass = ApiException.class;
synchronized (statusLock) {
if (entryStatusCounts.containsKey(code)) {
entryStatusCounts.get(code).incrementAndGet();
} else {
entryStatusCounts.put(code, new AtomicInteger(1));
}
}
}
synchronized (errorLock) {
if (entryExceptionCounts.containsKey(exceptionClass)) {
entryExceptionCounts.get(exceptionClass).incrementAndGet();
} else {
partialBatchFailures.incrementAndGet();
entryExceptionCounts.put(exceptionClass, new AtomicInteger(1));
}
}
}
/** Calculates and formats the message with request and entry failure count. */
@Nullable
BatchingException asException() {
if (requestExceptionCounts.isEmpty() && partialBatchFailures.get() == 0) {
return null;
}
StringBuilder sb = new StringBuilder();
int batchFailures = requestExceptionCounts.size();
if (requestExceptionCounts.isEmpty()) {
sb.append("Batching finished with ");
} else {
sb.append(String.format("%d batches failed to apply due to: ", batchFailures));
// compose the exception and return it
for (Class req : requestExceptionCounts.keySet()) {
sb.append(
String.format("%d %s ", requestExceptionCounts.get(req).get(), req.getSimpleName()));
if (req.equals(ApiException.class)) {
sb.append("(");
for (StatusCode.Code statusCode : requestStatusCounts.keySet()) {
sb.append(
String.format("%d %s ", requestStatusCounts.get(statusCode).get(), statusCode));
}
sb.append(") ");
}
}
}
if (partialBatchFailures.get() > 0) {
sb.append(String.format("%d partial failures.", partialBatchFailures.get()));
int totalEntriesEx = 0;
for (AtomicInteger ai : entryExceptionCounts.values()) {
totalEntriesEx += ai.get();
}
sb.append(
String.format(
" The %d partial failures contained %d entries that failed with: ",
partialBatchFailures.get(), totalEntriesEx));
for (Class entry : entryExceptionCounts.keySet()) {
sb.append(
String.format("%d %s ", entryExceptionCounts.get(entry).get(), entry.getSimpleName()));
if (entry.equals(ApiException.class)) {
sb.append("(");
for (StatusCode.Code code : entryStatusCounts.keySet()) {
sb.append(String.format("%d %s ", entryStatusCounts.get(code).get(), code));
}
sb.append(") ");
}
}
}
sb.append(".");
return new BatchingException(sb.toString());
}
}