What is pulsar built with?

Q: Which repos have a stack like pulsar's?

The ones that share most of its stack: open-metadata/OpenMetadata, prestodb/presto, and apache/hadoop.

pulsar is a Java repo built with JAX-RS, grpc-bom, javax.ws.rs-api, jersey-container-servlet, jersey-container-servlet-core, and 19 more. It stores its data in org.apache.avro:avro, com.github.ben-manes.caffeine:caffeine, and github.com/apache/pulsar-client-go, signs people in with aws-java-sdk-sts, java-jwt, jjwt-impl, jjwt-jackson, jwks-rsa, and 2 more, makes its content with commonmark-ext-gfm-tables, commonmark-ext-heading-anchor, and org.commonmark:commonmark, validates its data with jakarta.validation-api, is tested with hadoop-minicluster, io.opentelemetry:opentelemetry-sdk-testing, jersey-test-framework-core, jersey-test-framework-provider-grizzly2, k3s, and 13 more, deploys with client-java, commons-logging, docker-java-core, io.opentelemetry:opentelemetry-bom, io.prometheus:simpleclient, and 17 more, and uses aws-java-sdk-bom, curator-recipes, hadoop-common, org.apache.hadoop:hadoop-hdfs-client, zookeeper, and 1 more. It has 1,232,950 written lines, with 2,292 test files.

Read on November 8, 2026, at commit 1b6377e. Read it as markdown

Backend

The base 1

JAX-RS121 files

Data 9

github.com/apache/pulsar-client-go5 files
RocksDB1 file
org.apache.hadoop:hadoop-hdfs-client
org.apache.avro:avro27 files
com.github.ben-manes.caffeine:caffeine20 files
aws-java-sdk-bom
curator-recipes
hadoop-common
zookeeper

Sign-in 7

io.jsonwebtoken:jjwt-api3 files
org.apache.kerby:kerb-simplekdc1 file
aws-java-sdk-sts
java-jwt
jjwt-impl
jjwt-jackson
jwks-rsa

Support

The base 23

jakarta.servlet:jakarta.servlet-api46 files
org.glassfish.jersey.media:jersey-media-multipart24 files
org.eclipse.jetty:jetty-util16 files
org.eclipse.jetty.ee10.websocket:jetty-ee10-websocket-jetty-server12 files
org.eclipse.jetty:jetty-server11 files
org.eclipse.jetty.websocket:jetty-websocket-jetty-api10 files
org.eclipse.jetty.ee10:jetty-ee10-servlet7 files
javax.servlet:javax.servlet-api5 files
org.glassfish.jersey.core:jersey-server5 files
org.eclipse.jetty.ee8:jetty-ee8-servlet3 files
com.google.inject:guice1 file
org.apache.felix:org.apache.felix.http.wrappers1 file

11 more

org.eclipse.jetty.compression:jetty-compression-gzip1 file
org.eclipse.jetty.compression:jetty-compression-server1 file
grpc-bom
javax.ws.rs-api
jersey-container-servlet
jersey-container-servlet-core
jersey-hk2
jersey-media-json-jackson
jetty-bom
jetty-ee10-servlets
vertx-web

Content 3

org.commonmark:commonmark1 file
commonmark-ext-gfm-tables
commonmark-ext-heading-anchor

Validation 1

jakarta.validation-api

Testing 18

github.com/stretchr/testify13 files
io.opentelemetry:opentelemetry-sdk-testing
org.testng:testng1,944 files
org.mockito:mockito-core645 files
org.assertj:assertj-core586 files
org.awaitility:awaitility512 files
org.testcontainers:testcontainers40 files
org.skyscreamer:jsonassert9 files
org.hamcrest:hamcrest5 files
com.github.stefanbirkner:system-lambda1 file
hadoop-minicluster
jersey-test-framework-core

6 more

jersey-test-framework-provider-grizzly2
k3s
mockito-bom
rest-assured
testcontainers-bom
wiremock-standalone

Deploy 22

OpenTelemetry101 files
org.apache.logging.log4j:log4j-api8 files
io.opentelemetry:opentelemetry-sdk4 files
github.com/prometheus/client_model2 files
Prometheus2 files
io.opentelemetry:opentelemetry-exporter-prometheus1 file
io.opentelemetry.semconv:opentelemetry-semconv1 file
io.opentelemetry:opentelemetry-bom
io.prometheus:simpleclient
org.apache.logging.log4j:log4j-bom
org.slf4j:slf4j-api9 files
org.apache.logging.log4j:log4j-core4 files

10 more

github.com/sirupsen/logrus1 file
client-java
commons-logging
docker-java-core
jcl-over-slf4j
log4j-layout-template-json
metrics-core
simpleclient_hotspot
simpleclient_servlet
slf4j-bom

Tools 10

OpenJDK58 files
com.google.errorprone:error_prone_annotations1 file
org.apache.ant:ant
Swagger
org.projectlombok:lombok946 files
org.jspecify:jspecify57 files
commons-cli
jsr305
spotbugs-annotations
swagger-annotations-jakarta

Other 98

Google37 files
Apache8 files
com.google.re2j:re2j4 files
org.apache.commons:commons-text2 files
google.golang.org/grpc1 file
com.google.guava:guava
org.apache.httpcomponents.client5:httpclient5
org.apache.commons:commons-lang3324 files
io.netty:netty-buffer167 files
com.fasterxml.jackson:jackson-bom113 files
info.picocli:picocli88 files
com.fasterxml.jackson.core:jackson-core47 files

86 more

org.apache.commons:commons-collections432 files
io.netty:netty-handler28 files
it.unimi.dsi:fastutil17 files
org.asynchttpclient:async-http-client14 files
net.bytebuddy:byte-buddy10 files
org.json:json7 files
org.eclipse.jetty:jetty-client5 files
io.netty:netty-resolver-dns4 files
org.apache.httpcomponents:httpclient4 files
org.roaringbitmap:RoaringBitmap4 files
com.github.zafarkhaja:java-semver3 files
google.golang.org/protobuf3 files
io.grpc:grpc-stub3 files
org.apache.commons:commons-compress3 files
org.glassfish.jersey.core:jersey-client3 files
com.fasterxml.jackson.dataformat:jackson-dataformat-yaml2 files
io.airlift:aircompressor2 files
io.vertx:vertx-core2 files
org.objenesis:objenesis2 files
org.zeroturnaround:zt-zip2 files
com.amazonaws:aws-java-sdk-core1 file
com.cronutils:cron-utils1 file
com.fasterxml.jackson.datatype:jackson-datatype-jdk81 file
com.fasterxml.jackson.datatype:jackson-datatype-jsr3101 file
com.github.luben:zstd-jni1 file
com.spotify:completable-futures1 file
gopkg.in/yaml.v21 file
joda-time:joda-time1 file
org.apache.commons:commons-math31 file
org.javassist:javassist1 file
org.jline:jline1 file
org.xerial.snappy:snappy-java1 file
bc-fips
bcpkix-fips
bcpkix-jdk18on
bcprov-jdk18on
bctls-jdk18on
bcutil-fips
byte-buddy-agent
commons-beanutils
commons-codec
commons-io
conscrypt-openjdk-uber
datasketches-java
datasketches-memory
disruptor
failsafe
grpc-netty
HdrHistogram
httpcore
httpcore5
ipaddress
jackson-annotations
jackson-databind
jackson-module-parameter-names
jakarta.activation-api
jakarta.annotation-api
jakarta.xml.bind-api
jaxb-api
jctools-core
jctools-core-jdk11
jna
json-smart
logging-interceptor
lz4-java
netty-bom
netty-codec-haproxy
netty-codec-http
netty-codec-http2
netty-codec-socks
netty-common
netty-handler-proxy
netty-resolver-dns-native-macos
netty-tcnative-boringssl-static
netty-transport
netty-transport-classes-io_uring
netty-transport-native-epoll
netty-transport-native-io_uring
netty-transport-native-unix-common
okhttp-bom
okhttp-jvm
okio
okio-bom
reactive-streams
reflections
snakeyaml

Other repos with a similar stack

Ordered by how much of its stack they share with pulsar, then by stars.

open-metadataOpenMetadata
15.7k
The Open Context Layer for Data and AI , OpenMetadata is the open platform for building trusted data context and business semantics for humans, AI assistants, and agents.
20 of 192 in commonCompare →
prestodbpresto
16.8k
The official home of the Presto distributed SQL query engine for big data
18 of 192 in commonCompare →
apachehadoop
15.7k
Apache Hadoop
16 of 192 in commonCompare →
apacheflink
26.5k
Apache Flink
14 of 192 in commonCompare →
apachedoris
16.2k
Apache Doris is a real-time analytics and hybrid search database for AI agents.
13 of 192 in commonCompare →
apachedubbo
41.6k
The java implementation of Apache Dubbo. An RPC and microservice framework.
11 of 192 in commonCompare →

Frequently asked questions

What language is pulsar written in?

pulsar is written in Java, with 1,232,950 written lines.

What framework does pulsar use?

pulsar is built with JAX-RS, grpc-bom, javax.ws.rs-api, jersey-container-servlet, jersey-container-servlet-core, jersey-hk2, jersey-media-json-jackson, jetty-bom, jetty-ee10-servlets, vertx-web, jakarta.servlet:jakarta.servlet-api, org.glassfish.jersey.media:jersey-media-multipart, org.eclipse.jetty:jetty-util, org.eclipse.jetty.ee10.websocket:jetty-ee10-websocket-jetty-server, org.eclipse.jetty:jetty-server, org.eclipse.jetty.websocket:jetty-websocket-jetty-api, org.eclipse.jetty.ee10:jetty-ee10-servlet, javax.servlet:javax.servlet-api, org.glassfish.jersey.core:jersey-server, org.eclipse.jetty.ee8:jetty-ee8-servlet, com.google.inject:guice, org.apache.felix:org.apache.felix.http.wrappers, org.eclipse.jetty.compression:jetty-compression-gzip, and org.eclipse.jetty.compression:jetty-compression-server.

What database does pulsar use?

pulsar stores its data in org.apache.avro:avro, com.github.ben-manes.caffeine:caffeine, and github.com/apache/pulsar-client-go.

What does pulsar sign people in with?

pulsar signs people in with aws-java-sdk-sts, java-jwt, jjwt-impl, jjwt-jackson, jwks-rsa, io.jsonwebtoken:jjwt-api, and org.apache.kerby:kerb-simplekdc.

What services does pulsar use?

pulsar uses aws-java-sdk-bom, curator-recipes, hadoop-common, org.apache.hadoop:hadoop-hdfs-client, zookeeper, and RocksDB.

Does pulsar have tests?

Yes. pulsar has 2,292 test files and is tested with hadoop-minicluster, io.opentelemetry:opentelemetry-sdk-testing, jersey-test-framework-core, jersey-test-framework-provider-grizzly2, k3s, mockito-bom, rest-assured, testcontainers-bom, wiremock-standalone, org.testng:testng, org.mockito:mockito-core, org.assertj:assertj-core, org.awaitility:awaitility, org.testcontainers:testcontainers, github.com/stretchr/testify, org.skyscreamer:jsonassert, org.hamcrest:hamcrest, and com.github.stefanbirkner:system-lambda.

Which repos have a stack like pulsar's?

The ones that share most of its stack:open-metadata/OpenMetadata prestodb/presto apache/hadoop