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Fix SnapshotStats toXContent()/fromXContent() round trip serialization #128928

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Merged
merged 10 commits into from
Jun 6, 2025
Merged

Fix SnapshotStats toXContent()/fromXContent() round trip serialization #128928

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37468f7
Fix SnapshotStats toXContent()/fromXContent() round trip serialization
JeremyDahlgren Jun 4, 2025
7d47a7b
Update docs/changelog/128928.yaml
JeremyDahlgren Jun 4, 2025
fb6b616
Move SnapshotStats.fromXContent() to SnapshotStatsTest
JeremyDahlgren Jun 4, 2025
54fc6dc
Delete docs/changelog/128928.yaml
JeremyDahlgren Jun 4, 2025
82fc4b5
Merge branch 'main' into fix/snapshotstats-fromxcontent
JeremyDahlgren Jun 4, 2025
165314c
Revert change to AbstractXContentTestCase
JeremyDahlgren Jun 5, 2025
068bee9
Merge branch 'main' into fix/snapshotstats-fromxcontent
JeremyDahlgren Jun 5, 2025
b7d3929
Merge branch 'main' into fix/snapshotstats-fromxcontent
JeremyDahlgren Jun 5, 2025
27e7379
Merge branch 'main' into fix/snapshotstats-fromxcontent
JeremyDahlgren Jun 5, 2025
ab6d21a
Merge branch 'main' into fix/snapshotstats-fromxcontent
JeremyDahlgren Jun 6, 2025
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104 changes: 0 additions & 104 deletions .../src/main/java/org/elasticsearch/action/admin/cluster/snapshots/status/SnapshotStats.java
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Original file line number Diff line number Diff line change
Expand Up @@ -14,12 +14,10 @@
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.io.stream.Writeable;
import org.elasticsearch.common.unit.ByteSizeValue;
import org.elasticsearch.common.xcontent.XContentParserUtils;
import org.elasticsearch.core.TimeValue;
import org.elasticsearch.xcontent.ToXContent;
import org.elasticsearch.xcontent.ToXContentObject;
import org.elasticsearch.xcontent.XContentBuilder;
import org.elasticsearch.xcontent.XContentParser;

import java.io.IOException;

Expand Down Expand Up @@ -192,108 +190,6 @@ public XContentBuilder toXContent(XContentBuilder builder, ToXContent.Params par
return builder.endObject();
}

public static SnapshotStats fromXContent(XContentParser parser) throws IOException {
// Parse this old school style instead of using the ObjectParser since there's an impedance mismatch between how the
// object has historically been written as JSON versus how it is structured in Java.
XContentParser.Token token = parser.currentToken();
if (token == null) {
token = parser.nextToken();
}
XContentParserUtils.ensureExpectedToken(XContentParser.Token.START_OBJECT, token, parser);
long startTime = 0;
long time = 0;
int incrementalFileCount = 0;
int totalFileCount = 0;
int processedFileCount = 0;
long incrementalSize = 0;
long totalSize = 0;
long processedSize = 0;
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
XContentParserUtils.ensureExpectedToken(XContentParser.Token.FIELD_NAME, token, parser);
String currentName = parser.currentName();
token = parser.nextToken();
if (currentName.equals(Fields.INCREMENTAL)) {
XContentParserUtils.ensureExpectedToken(XContentParser.Token.START_OBJECT, token, parser);
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
XContentParserUtils.ensureExpectedToken(XContentParser.Token.FIELD_NAME, token, parser);
String innerName = parser.currentName();
token = parser.nextToken();
if (innerName.equals(Fields.FILE_COUNT)) {
XContentParserUtils.ensureExpectedToken(XContentParser.Token.VALUE_NUMBER, token, parser);
incrementalFileCount = parser.intValue();
} else if (innerName.equals(Fields.SIZE_IN_BYTES)) {
XContentParserUtils.ensureExpectedToken(XContentParser.Token.VALUE_NUMBER, token, parser);
incrementalSize = parser.longValue();
} else {
// Unknown sub field, skip
if (token == XContentParser.Token.START_OBJECT || token == XContentParser.Token.START_ARRAY) {
parser.skipChildren();
}
}
}
} else if (currentName.equals(Fields.PROCESSED)) {
XContentParserUtils.ensureExpectedToken(XContentParser.Token.START_OBJECT, token, parser);
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
XContentParserUtils.ensureExpectedToken(XContentParser.Token.FIELD_NAME, token, parser);
String innerName = parser.currentName();
token = parser.nextToken();
if (innerName.equals(Fields.FILE_COUNT)) {
XContentParserUtils.ensureExpectedToken(XContentParser.Token.VALUE_NUMBER, token, parser);
processedFileCount = parser.intValue();
} else if (innerName.equals(Fields.SIZE_IN_BYTES)) {
XContentParserUtils.ensureExpectedToken(XContentParser.Token.VALUE_NUMBER, token, parser);
processedSize = parser.longValue();
} else {
// Unknown sub field, skip
if (token == XContentParser.Token.START_OBJECT || token == XContentParser.Token.START_ARRAY) {
parser.skipChildren();
}
}
}
} else if (currentName.equals(Fields.TOTAL)) {
XContentParserUtils.ensureExpectedToken(XContentParser.Token.START_OBJECT, token, parser);
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
XContentParserUtils.ensureExpectedToken(XContentParser.Token.FIELD_NAME, token, parser);
String innerName = parser.currentName();
token = parser.nextToken();
if (innerName.equals(Fields.FILE_COUNT)) {
XContentParserUtils.ensureExpectedToken(XContentParser.Token.VALUE_NUMBER, token, parser);
totalFileCount = parser.intValue();
} else if (innerName.equals(Fields.SIZE_IN_BYTES)) {
XContentParserUtils.ensureExpectedToken(XContentParser.Token.VALUE_NUMBER, token, parser);
totalSize = parser.longValue();
} else {
// Unknown sub field, skip
if (token == XContentParser.Token.START_OBJECT || token == XContentParser.Token.START_ARRAY) {
parser.skipChildren();
}
}
}
} else if (currentName.equals(Fields.START_TIME_IN_MILLIS)) {
XContentParserUtils.ensureExpectedToken(XContentParser.Token.VALUE_NUMBER, token, parser);
startTime = parser.longValue();
} else if (currentName.equals(Fields.TIME_IN_MILLIS)) {
XContentParserUtils.ensureExpectedToken(XContentParser.Token.VALUE_NUMBER, token, parser);
time = parser.longValue();
} else {
// Unknown field, skip
if (token == XContentParser.Token.START_OBJECT || token == XContentParser.Token.START_ARRAY) {
parser.skipChildren();
}
}
}
return new SnapshotStats(
startTime,
time,
incrementalFileCount,
totalFileCount,
processedFileCount,
incrementalSize,
totalSize,
processedSize
);
}

/**
* Add stats instance to the total
* @param stats Stats instance to add
Expand Down
6 changes: 5 additions & 1 deletion ...rg/elasticsearch/action/admin/cluster/snapshots/status/SnapshotIndexShardStatusTests.java
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Original file line number Diff line number Diff line change
Expand Up @@ -95,7 +95,11 @@ protected boolean supportsUnknownFields() {
innerParser.declareString(constructorArg(), new ParseField(SnapshotIndexShardStatus.Fields.STAGE));
innerParser.declareString(optionalConstructorArg(), new ParseField(SnapshotIndexShardStatus.Fields.NODE));
innerParser.declareString(optionalConstructorArg(), new ParseField(SnapshotIndexShardStatus.Fields.REASON));
innerParser.declareObject(constructorArg(), (p, c) -> SnapshotStats.fromXContent(p), new ParseField(SnapshotStats.Fields.STATS));
innerParser.declareObject(
constructorArg(),
(p, c) -> SnapshotStatsTests.fromXContent(p),
new ParseField(SnapshotStats.Fields.STATS)
);
PARSER = (p, indexId, shardName) -> {
// Combine the index name in the context with the shard name passed in for the named object parser
// into a ShardId to pass as context for the inner parser.
Expand Down
6 changes: 5 additions & 1 deletion ...ava/org/elasticsearch/action/admin/cluster/snapshots/status/SnapshotIndexStatusTests.java
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Original file line number Diff line number Diff line change
Expand Up @@ -57,7 +57,11 @@ public class SnapshotIndexStatusTests extends AbstractXContentTestCase<SnapshotI
(p, c) -> SnapshotShardsStatsTests.PARSER.apply(p, null),
new ParseField(SnapshotShardsStats.Fields.SHARDS_STATS)
);
innerParser.declareObject(constructorArg(), (p, c) -> SnapshotStats.fromXContent(p), new ParseField(SnapshotStats.Fields.STATS));
innerParser.declareObject(
constructorArg(),
(p, c) -> SnapshotStatsTests.fromXContent(p),
new ParseField(SnapshotStats.Fields.STATS)
);
innerParser.declareNamedObjects(
constructorArg(),
SnapshotIndexShardStatusTests.PARSER,
Expand Down
119 changes: 118 additions & 1 deletion ...test/java/org/elasticsearch/action/admin/cluster/snapshots/status/SnapshotStatsTests.java
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Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,7 @@

package org.elasticsearch.action.admin.cluster.snapshots.status;

import org.elasticsearch.common.xcontent.XContentParserUtils;
import org.elasticsearch.test.AbstractXContentTestCase;
import org.elasticsearch.xcontent.XContentParser;

Expand All @@ -27,6 +28,14 @@ protected SnapshotStats createTestInstance() {
long incrementalSize = ((long) randomIntBetween(0, Integer.MAX_VALUE)) * 2;
long totalSize = ((long) randomIntBetween(0, Integer.MAX_VALUE)) * 2;
long processedSize = ((long) randomIntBetween(0, Integer.MAX_VALUE)) * 2;

// toXContent() omits the "processed" sub-object if processedFileCount == incrementalFileCount, so here we increase the probability
// of that scenario so we can make sure the processed values are set as expected in fromXContent().
if (randomBoolean()) {
processedFileCount = incrementalFileCount;
processedSize = incrementalSize;
}

return new SnapshotStats(
startTime,
time,
Expand All @@ -41,11 +50,119 @@ protected SnapshotStats createTestInstance() {

@Override
protected SnapshotStats doParseInstance(XContentParser parser) throws IOException {
return SnapshotStats.fromXContent(parser);
return fromXContent(parser);
}

@Override
protected boolean supportsUnknownFields() {
return true;
}

static SnapshotStats fromXContent(XContentParser parser) throws IOException {
// Parse this old school style instead of using the ObjectParser since there's an impedance mismatch between how the
// object has historically been written as JSON versus how it is structured in Java.
XContentParser.Token token = parser.currentToken();
if (token == null) {
token = parser.nextToken();
}
XContentParserUtils.ensureExpectedToken(XContentParser.Token.START_OBJECT, token, parser);
long startTime = 0;
long time = 0;
int incrementalFileCount = 0;
int totalFileCount = 0;
int processedFileCount = Integer.MIN_VALUE;
long incrementalSize = 0;
long totalSize = 0;
long processedSize = Long.MIN_VALUE;
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
XContentParserUtils.ensureExpectedToken(XContentParser.Token.FIELD_NAME, token, parser);
String currentName = parser.currentName();
token = parser.nextToken();
if (currentName.equals(SnapshotStats.Fields.INCREMENTAL)) {
XContentParserUtils.ensureExpectedToken(XContentParser.Token.START_OBJECT, token, parser);
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
XContentParserUtils.ensureExpectedToken(XContentParser.Token.FIELD_NAME, token, parser);
String innerName = parser.currentName();
token = parser.nextToken();
if (innerName.equals(SnapshotStats.Fields.FILE_COUNT)) {
XContentParserUtils.ensureExpectedToken(XContentParser.Token.VALUE_NUMBER, token, parser);
incrementalFileCount = parser.intValue();
} else if (innerName.equals(SnapshotStats.Fields.SIZE_IN_BYTES)) {
XContentParserUtils.ensureExpectedToken(XContentParser.Token.VALUE_NUMBER, token, parser);
incrementalSize = parser.longValue();
} else {
// Unknown sub field, skip
if (token == XContentParser.Token.START_OBJECT || token == XContentParser.Token.START_ARRAY) {
parser.skipChildren();
}
}
}
} else if (currentName.equals(SnapshotStats.Fields.PROCESSED)) {
XContentParserUtils.ensureExpectedToken(XContentParser.Token.START_OBJECT, token, parser);
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
XContentParserUtils.ensureExpectedToken(XContentParser.Token.FIELD_NAME, token, parser);
String innerName = parser.currentName();
token = parser.nextToken();
if (innerName.equals(SnapshotStats.Fields.FILE_COUNT)) {
XContentParserUtils.ensureExpectedToken(XContentParser.Token.VALUE_NUMBER, token, parser);
processedFileCount = parser.intValue();
} else if (innerName.equals(SnapshotStats.Fields.SIZE_IN_BYTES)) {
XContentParserUtils.ensureExpectedToken(XContentParser.Token.VALUE_NUMBER, token, parser);
processedSize = parser.longValue();
} else {
// Unknown sub field, skip
if (token == XContentParser.Token.START_OBJECT || token == XContentParser.Token.START_ARRAY) {
parser.skipChildren();
}
}
}
} else if (currentName.equals(SnapshotStats.Fields.TOTAL)) {
XContentParserUtils.ensureExpectedToken(XContentParser.Token.START_OBJECT, token, parser);
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
XContentParserUtils.ensureExpectedToken(XContentParser.Token.FIELD_NAME, token, parser);
String innerName = parser.currentName();
token = parser.nextToken();
if (innerName.equals(SnapshotStats.Fields.FILE_COUNT)) {
XContentParserUtils.ensureExpectedToken(XContentParser.Token.VALUE_NUMBER, token, parser);
totalFileCount = parser.intValue();
} else if (innerName.equals(SnapshotStats.Fields.SIZE_IN_BYTES)) {
XContentParserUtils.ensureExpectedToken(XContentParser.Token.VALUE_NUMBER, token, parser);
totalSize = parser.longValue();
} else {
// Unknown sub field, skip
if (token == XContentParser.Token.START_OBJECT || token == XContentParser.Token.START_ARRAY) {
parser.skipChildren();
}
}
}
} else if (currentName.equals(SnapshotStats.Fields.START_TIME_IN_MILLIS)) {
XContentParserUtils.ensureExpectedToken(XContentParser.Token.VALUE_NUMBER, token, parser);
startTime = parser.longValue();
} else if (currentName.equals(SnapshotStats.Fields.TIME_IN_MILLIS)) {
XContentParserUtils.ensureExpectedToken(XContentParser.Token.VALUE_NUMBER, token, parser);
time = parser.longValue();
} else {
// Unknown field, skip
if (token == XContentParser.Token.START_OBJECT || token == XContentParser.Token.START_ARRAY) {
parser.skipChildren();
}
}
}
// Handle the case where the "processed" sub-object is omitted in toXContent() when processedFileCount == incrementalFileCount.
if (processedFileCount == Integer.MIN_VALUE) {
assert processedSize == Long.MIN_VALUE;
processedFileCount = incrementalFileCount;
processedSize = incrementalSize;
}
return new SnapshotStats(
startTime,
time,
incrementalFileCount,
totalFileCount,
processedFileCount,
incrementalSize,
totalSize,
processedSize
);
}
}
2 changes: 1 addition & 1 deletion ...est/java/org/elasticsearch/action/admin/cluster/snapshots/status/SnapshotStatusTests.java
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Original file line number Diff line number Diff line change
Expand Up @@ -77,7 +77,7 @@ public class SnapshotStatusTests extends AbstractChunkedSerializingTestCase<Snap
PARSER.declareBoolean(optionalConstructorArg(), new ParseField(SnapshotStatus.INCLUDE_GLOBAL_STATE));
PARSER.declareField(
constructorArg(),
SnapshotStats::fromXContent,
SnapshotStatsTests::fromXContent,
new ParseField(SnapshotStats.Fields.STATS),
ObjectParser.ValueType.OBJECT
);
Expand Down