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add distributed locking to jobs in alerting
Signed-off-by: Subhobrata Dey <[email protected]>
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132 changes: 132 additions & 0 deletions
132
core/src/main/kotlin/org/opensearch/alerting/core/lock/LockModel.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,132 @@ | ||
| /* | ||
| * Copyright OpenSearch Contributors | ||
| * SPDX-License-Identifier: Apache-2.0 | ||
| */ | ||
|
|
||
| package org.opensearch.alerting.core.lock | ||
|
|
||
| import org.opensearch.core.xcontent.ToXContent | ||
| import org.opensearch.core.xcontent.ToXContentObject | ||
| import org.opensearch.core.xcontent.XContentBuilder | ||
| import org.opensearch.core.xcontent.XContentParser | ||
| import org.opensearch.core.xcontent.XContentParserUtils | ||
| import org.opensearch.index.seqno.SequenceNumbers | ||
| import java.io.IOException | ||
| import java.time.Instant | ||
|
|
||
| class LockModel( | ||
| val lockId: String, | ||
| val scheduledJobId: String, | ||
| val lockTime: Instant, | ||
| val lockDurationSeconds: Long, | ||
| val released: Boolean, | ||
| val seqNo: Long, | ||
| val primaryTerm: Long | ||
| ) : ToXContentObject { | ||
|
|
||
| constructor( | ||
| copyLock: LockModel, | ||
| seqNo: Long, | ||
| primaryTerm: Long | ||
| ) : this ( | ||
| copyLock.lockId, | ||
| copyLock.scheduledJobId, | ||
| copyLock.lockTime, | ||
| copyLock.lockDurationSeconds, | ||
| copyLock.released, | ||
| seqNo, | ||
| primaryTerm | ||
| ) | ||
|
|
||
| constructor( | ||
| copyLock: LockModel, | ||
| released: Boolean | ||
| ) : this ( | ||
| copyLock.lockId, | ||
| copyLock.scheduledJobId, | ||
| copyLock.lockTime, | ||
| copyLock.lockDurationSeconds, | ||
| released, | ||
| copyLock.seqNo, | ||
| copyLock.primaryTerm | ||
| ) | ||
|
|
||
| constructor( | ||
| copyLock: LockModel, | ||
| updateLockTime: Instant, | ||
| lockDurationSeconds: Long, | ||
| released: Boolean | ||
| ) : this ( | ||
| copyLock.lockId, | ||
| copyLock.scheduledJobId, | ||
| updateLockTime, | ||
| lockDurationSeconds, | ||
| released, | ||
| copyLock.seqNo, | ||
| copyLock.primaryTerm | ||
| ) | ||
|
|
||
| constructor( | ||
| scheduledJobId: String, | ||
| lockTime: Instant, | ||
| lockDurationSeconds: Long, | ||
| released: Boolean | ||
| ) : this ( | ||
| generateLockId(scheduledJobId), | ||
| scheduledJobId, | ||
| lockTime, | ||
| lockDurationSeconds, | ||
| released, | ||
| SequenceNumbers.UNASSIGNED_SEQ_NO, | ||
| SequenceNumbers.UNASSIGNED_PRIMARY_TERM | ||
| ) | ||
|
|
||
| fun expired(): Boolean { | ||
| return lockTime.epochSecond + lockDurationSeconds < Instant.now().epochSecond | ||
| } | ||
|
|
||
| override fun toXContent(builder: XContentBuilder, params: ToXContent.Params): XContentBuilder { | ||
| builder.startObject() | ||
| .field(SCHEDULED_JOB_ID, scheduledJobId) | ||
| .field(LOCK_TIME, lockTime.epochSecond) | ||
| .field(LOCK_DURATION, lockDurationSeconds) | ||
| .field(RELEASED, released) | ||
| .endObject() | ||
| return builder | ||
| } | ||
|
|
||
| companion object { | ||
| const val SCHEDULED_JOB_ID = "scheduled_job_id" | ||
| const val LOCK_TIME = "lock_time" | ||
| const val LOCK_DURATION = "lock_duration_seconds" | ||
| const val RELEASED = "released" | ||
|
|
||
| fun generateLockId(scheduledJobId: String): String { | ||
| return "$scheduledJobId-lock" | ||
| } | ||
|
|
||
| @JvmStatic | ||
| @JvmOverloads | ||
| @Throws(IOException::class) | ||
| fun parse(xcp: XContentParser, seqNo: Long, primaryTerm: Long): LockModel { | ||
| lateinit var scheduledJobId: String | ||
| lateinit var lockTime: Instant | ||
| var lockDurationSeconds: Long = 0L | ||
| var released: Boolean = false | ||
|
|
||
| XContentParserUtils.ensureExpectedToken(XContentParser.Token.START_OBJECT, xcp.currentToken(), xcp) | ||
| while (xcp.nextToken() != XContentParser.Token.END_OBJECT) { | ||
| val fieldName = xcp.currentName() | ||
| xcp.nextToken() | ||
|
|
||
| when (fieldName) { | ||
| SCHEDULED_JOB_ID -> scheduledJobId = xcp.text() | ||
| LOCK_TIME -> lockTime = Instant.ofEpochSecond(xcp.longValue()) | ||
| LOCK_DURATION -> lockDurationSeconds = xcp.longValue() | ||
| RELEASED -> released = xcp.booleanValue() | ||
| } | ||
| } | ||
| return LockModel(generateLockId(scheduledJobId), scheduledJobId, lockTime, lockDurationSeconds, released, seqNo, primaryTerm) | ||
| } | ||
| } | ||
| } |
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