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Support agentless OpenFeature CDN polling without the Java agent #12109

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Support agentless OpenFeature CDN polling without the Java agent #12109

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468be5f
Add reusable Feature Flagging evaluator and CDN source
leoromanovsky Jul 30, 2026
2af86eb
Delegate agent-backed flag evaluation to shared core
leoromanovsky Jul 30, 2026
0c79289
Support CDN polling without the Java agent
leoromanovsky Jul 30, 2026
7346a72
Cover shared evaluation context behavior
leoromanovsky Jul 30, 2026
264a0ca
Remove duplicate Feature Flagging models and parsers
leoromanovsky Jul 30, 2026
1433302
Test UFC forward-compatible fields
leoromanovsky Jul 30, 2026
3bcfb76
Run core evaluator against canonical fixtures
leoromanovsky Jul 30, 2026
6df1d71
Fix explicit null UFC dates
leoromanovsky Jul 30, 2026
b8ce2a8
Cover standalone OpenFeature runtime paths
leoromanovsky Jul 30, 2026
8def9ce
Cover standalone runtime failure paths
leoromanovsky Jul 30, 2026
3e2adf8
Reject UFC configurations without flags
leoromanovsky Jul 30, 2026
094c6fc
Honor provider timeout during initial CDN poll
leoromanovsky Jul 30, 2026
d3c23f5
Contain exposure failures during evaluation
leoromanovsky Jul 30, 2026
30da6b6
Treat blank CDN URLs as managed endpoints
leoromanovsky Jul 30, 2026
cf86df8
Accept empty gzip not-modified responses
leoromanovsky Jul 30, 2026
7faa22e
Wait for asynchronous standalone configuration
leoromanovsky Jul 30, 2026
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57 changes: 57 additions & 0 deletions products/feature-flagging/feature-flagging-api/build.gradle.kts
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Original file line number Diff line number Diff line change
@@ -1,5 +1,7 @@
import datadog.gradle.plugin.testJvmConstraints.TestJvmConstraintsExtension
import groovy.lang.Closure
import org.gradle.api.tasks.SourceSetContainer
import java.util.zip.ZipFile

plugins {
`java-library`
Expand Down Expand Up @@ -42,13 +44,19 @@ java {

dependencies {
api("dev.openfeature:sdk:1.20.1")
implementation(libs.moshi)
implementation(libs.slf4j)

compileOnly(project(":products:feature-flagging:feature-flagging-bootstrap"))
compileOnly(project(":products:feature-flagging:feature-flagging-config"))
compileOnly(project(":products:feature-flagging:feature-flagging-core"))
compileOnly(project(":products:feature-flagging:feature-flagging-http"))
compileOnly(project(":utils:config-utils"))
compileOnly("io.opentelemetry:opentelemetry-api:1.47.0")

testImplementation(project(":products:feature-flagging:feature-flagging-bootstrap"))
testImplementation(project(":products:feature-flagging:feature-flagging-core"))
testImplementation(project(":products:feature-flagging:feature-flagging-http"))
testImplementation(project(":utils:config-utils"))
testImplementation("io.opentelemetry:opentelemetry-api:1.47.0")
testImplementation(libs.bundles.junit5)
Expand Down Expand Up @@ -78,8 +86,57 @@ tasks.withType<Javadoc>().configureEach {
javadocTool = javaToolchains.javadocToolFor(java.toolchain)
}

val coreProject = project(":products:feature-flagging:feature-flagging-core")
val httpProject = project(":products:feature-flagging:feature-flagging-http")
val bootstrapProject = project(":products:feature-flagging:feature-flagging-bootstrap")

tasks.named<Jar>("jar") {
from(coreProject.extensions.getByType<SourceSetContainer>().named("main").map { it.output })
from(httpProject.extensions.getByType<SourceSetContainer>().named("main").map { it.output })
from(bootstrapProject.extensions.getByType<SourceSetContainer>().named("main").map { it.output }) {
include("datadog/trace/api/featureflag/ufc/v1/**")
}
Comment on lines +96 to +98

@sameerank sameerank Jul 30, 2026

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A concern from Codex

This embeds the UFC model in dd-openfeature.jar, while the same classes are supplied by the agent on the bootstrap classloader. Standard parent-first delegation makes them identical at runtime, but a child-first application classloader could load this embedded copy and make gateway-provided ServerConfiguration objects type-incompatible with the provider’s evaluator. Do we support such classloaders? If so, can we add a child-first classloading test; otherwise, please document the parent-first delegation requirement.

}

tasks.withType<Test>().configureEach {
dependsOn(tasks.named("jar"))
systemProperty(
"dd.openfeature.test.jar",
tasks.named<Jar>("jar").get().archiveFile.get().asFile.absolutePath
)
}

// The dd-openfeature provider jar is not produced by the CI `build` job, so there is no reference
// artifact to compare against. Disable the release jar comparison gate registered by publish.gradle.
tasks.named("compareToReferenceJar") {
enabled = false
}

tasks.register("verifyDdOpenfeatureArtifact") {
dependsOn(tasks.named("jar"), tasks.named("generatePomFileForMavenPublication"))
doLast {
val providerJar = tasks.named<Jar>("jar").get().archiveFile.get().asFile
val requiredEntries = setOf(
"datadog/openfeature/internal/core/ConfigurationStore.class",
"datadog/openfeature/internal/core/FlagEvaluator.class",
"datadog/openfeature/internal/http/CdnConfigurationSource.class",
"datadog/openfeature/internal/http/HttpConfigurationOptions.class",
"datadog/trace/api/featureflag/ufc/v1/ServerConfiguration.class"
)
ZipFile(providerJar).use { zip ->
val entryNames = zip.entries().asSequence().map { it.name }.toSet()
val missing = requiredEntries - entryNames
check(missing.isEmpty()) {
"dd-openfeature is missing embedded standalone classes: $missing"
}
}

val pom = layout.buildDirectory.file("publications/maven/pom-default.xml").get().asFile
check(pom.isFile) { "Generated dd-openfeature Maven POM is missing" }
val pomText = pom.readText()
check(pomText.contains("<artifactId>sdk</artifactId>"))
check(pomText.contains("<artifactId>moshi</artifactId>"))
check(!pomText.contains("feature-flagging-core"))
check(!pomText.contains("feature-flagging-http"))
}
}
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