+16
-18
@@ -1,24 +1,22 @@
|
||||
# Compiled class file
|
||||
*.class
|
||||
# Gradle
|
||||
.gradle/
|
||||
build/
|
||||
|
||||
# Log file
|
||||
*.log
|
||||
# IntelliJ IDEA
|
||||
.idea/
|
||||
*.iml
|
||||
|
||||
# BlueJ files
|
||||
*.ctxt
|
||||
# Eclipse
|
||||
.project
|
||||
.classpath
|
||||
.settings/
|
||||
|
||||
# Mobile Tools for Java (J2ME)
|
||||
.mtj.tmp/
|
||||
# macOS
|
||||
.DS_Store
|
||||
|
||||
# Package Files #
|
||||
*.jar
|
||||
*.war
|
||||
*.nar
|
||||
*.ear
|
||||
*.zip
|
||||
*.tar.gz
|
||||
*.rar
|
||||
|
||||
# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
|
||||
# Java
|
||||
hs_err_pid*
|
||||
replay_pid*
|
||||
|
||||
# Logs
|
||||
*.log
|
||||
|
||||
@@ -1,2 +1,81 @@
|
||||
# session-java
|
||||
A lightweight async protocol for WebSocket.
|
||||
<p align="center">
|
||||
<img src="logo.svg" alt="Session" width="150"/>
|
||||
</p>
|
||||
<h1 align="center">session-java</h1>
|
||||
<p align="center">A lightweight, async WebSocket protocol for Java.</p>
|
||||
|
||||
## Introduction
|
||||
|
||||
This library provides **type-safe WebSocket communication** with a request-response and notification system built on top of a flexible protocol.
|
||||
It ensures compile-time guarantees for message structure, reduces runtime errors, and simplifies building Rust client/server applications.
|
||||
|
||||
- **Dynamic Methods**: Each message includes a method enum for type safety.
|
||||
- **Typed Requests & Responses**: Automatic serialization and deserialization.
|
||||
- **Optional Notifications**: Send asynchronous notifications across sessions.
|
||||
|
||||
## Features
|
||||
|
||||
- Fully typed WebSocket sessions
|
||||
- Type-safe request/response mechanism
|
||||
- Optional typed notifications (Todo)
|
||||
- Lightweight, minimal runtime overhead
|
||||
|
||||
## Installation
|
||||
|
||||
```bash
|
||||
cargo add session-rs
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
### **Basic Example (client)**
|
||||
|
||||
```java
|
||||
Session session = Session.connect("ws://localhost:8080/");
|
||||
|
||||
TextNode response = session.request(Methods.Data, TextNode.valueOf("Hello from client")).get();
|
||||
|
||||
System.out.println(response);
|
||||
|
||||
session.close();
|
||||
```
|
||||
|
||||
### **Basic Example (server)**
|
||||
|
||||
#### ⚠️ Server functionality not done yet this is only for future examples
|
||||
|
||||
```java
|
||||
SessionServer server = SessionServer.bind("ws://localhost:8080/");
|
||||
|
||||
server.onClient((session, addr) -> {
|
||||
session.onRequest(Methods.Data, (id, data) -> {
|
||||
return SessionResult.ok(TextNode.valueOf("Response from server"));
|
||||
});
|
||||
});
|
||||
```
|
||||
|
||||
## Protocol
|
||||
|
||||
#### Request
|
||||
|
||||
The request `id` is separated from the peer, and will increment only on it's requests.
|
||||
|
||||
```json
|
||||
{ "type": "request", "id": 1, "method": "data", "data": "Hello from client" }
|
||||
```
|
||||
|
||||
#### Response
|
||||
|
||||
The response `id` **must** remain the same as the request.
|
||||
|
||||
```json
|
||||
{ "type": "response", "id": 1, "result": "Hello from server" }
|
||||
```
|
||||
|
||||
#### Notifications
|
||||
|
||||
A notification is a method that doesn't need validation or output, it simply notifies a peer for a specific information
|
||||
|
||||
```json
|
||||
{ "type": "notification", "result": "Hello from server" }
|
||||
```
|
||||
|
||||
@@ -0,0 +1,35 @@
|
||||
plugins {
|
||||
id 'java-library'
|
||||
}
|
||||
|
||||
group = "dev.selimaj.session"
|
||||
version = "0.1.0"
|
||||
|
||||
java {
|
||||
toolchain {
|
||||
languageVersion = JavaLanguageVersion.of(17)
|
||||
}
|
||||
}
|
||||
|
||||
repositories {
|
||||
mavenCentral()
|
||||
}
|
||||
|
||||
dependencies {
|
||||
// JSON parsing and serialization
|
||||
implementation 'com.fasterxml.jackson.core:jackson-databind:2.17.0'
|
||||
implementation 'com.fasterxml.jackson.core:jackson-annotations:2.17.0'
|
||||
implementation 'com.fasterxml.jackson.core:jackson-core:2.17.0'
|
||||
|
||||
// WebSocket API
|
||||
implementation 'jakarta.websocket:jakarta.websocket-api:2.1.1'
|
||||
// WebSocket client runtime
|
||||
implementation 'org.glassfish.tyrus:tyrus-client:2.1.2'
|
||||
|
||||
// For testing
|
||||
testImplementation 'org.junit.jupiter:junit-jupiter:5.10.0'
|
||||
}
|
||||
|
||||
test {
|
||||
useJUnitPlatform()
|
||||
}
|
||||
Vendored
BIN
Binary file not shown.
+7
@@ -0,0 +1,7 @@
|
||||
distributionBase=GRADLE_USER_HOME
|
||||
distributionPath=wrapper/dists
|
||||
distributionUrl=https\://services.gradle.org/distributions/gradle-8.7-bin.zip
|
||||
networkTimeout=10000
|
||||
validateDistributionUrl=true
|
||||
zipStoreBase=GRADLE_USER_HOME
|
||||
zipStorePath=wrapper/dists
|
||||
@@ -0,0 +1,249 @@
|
||||
#!/bin/sh
|
||||
|
||||
#
|
||||
# Copyright © 2015-2021 the original authors.
|
||||
#
|
||||
# Licensed under the Apache License, Version 2.0 (the "License");
|
||||
# you may not use this file except in compliance with the License.
|
||||
# You may obtain a copy of the License at
|
||||
#
|
||||
# https://www.apache.org/licenses/LICENSE-2.0
|
||||
#
|
||||
# Unless required by applicable law or agreed to in writing, software
|
||||
# distributed under the License is distributed on an "AS IS" BASIS,
|
||||
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
# See the License for the specific language governing permissions and
|
||||
# limitations under the License.
|
||||
#
|
||||
|
||||
##############################################################################
|
||||
#
|
||||
# Gradle start up script for POSIX generated by Gradle.
|
||||
#
|
||||
# Important for running:
|
||||
#
|
||||
# (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
|
||||
# noncompliant, but you have some other compliant shell such as ksh or
|
||||
# bash, then to run this script, type that shell name before the whole
|
||||
# command line, like:
|
||||
#
|
||||
# ksh Gradle
|
||||
#
|
||||
# Busybox and similar reduced shells will NOT work, because this script
|
||||
# requires all of these POSIX shell features:
|
||||
# * functions;
|
||||
# * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
|
||||
# «${var#prefix}», «${var%suffix}», and «$( cmd )»;
|
||||
# * compound commands having a testable exit status, especially «case»;
|
||||
# * various built-in commands including «command», «set», and «ulimit».
|
||||
#
|
||||
# Important for patching:
|
||||
#
|
||||
# (2) This script targets any POSIX shell, so it avoids extensions provided
|
||||
# by Bash, Ksh, etc; in particular arrays are avoided.
|
||||
#
|
||||
# The "traditional" practice of packing multiple parameters into a
|
||||
# space-separated string is a well documented source of bugs and security
|
||||
# problems, so this is (mostly) avoided, by progressively accumulating
|
||||
# options in "$@", and eventually passing that to Java.
|
||||
#
|
||||
# Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
|
||||
# and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
|
||||
# see the in-line comments for details.
|
||||
#
|
||||
# There are tweaks for specific operating systems such as AIX, CygWin,
|
||||
# Darwin, MinGW, and NonStop.
|
||||
#
|
||||
# (3) This script is generated from the Groovy template
|
||||
# https://github.com/gradle/gradle/blob/HEAD/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
|
||||
# within the Gradle project.
|
||||
#
|
||||
# You can find Gradle at https://github.com/gradle/gradle/.
|
||||
#
|
||||
##############################################################################
|
||||
|
||||
# Attempt to set APP_HOME
|
||||
|
||||
# Resolve links: $0 may be a link
|
||||
app_path=$0
|
||||
|
||||
# Need this for daisy-chained symlinks.
|
||||
while
|
||||
APP_HOME=${app_path%"${app_path##*/}"} # leaves a trailing /; empty if no leading path
|
||||
[ -h "$app_path" ]
|
||||
do
|
||||
ls=$( ls -ld "$app_path" )
|
||||
link=${ls#*' -> '}
|
||||
case $link in #(
|
||||
/*) app_path=$link ;; #(
|
||||
*) app_path=$APP_HOME$link ;;
|
||||
esac
|
||||
done
|
||||
|
||||
# This is normally unused
|
||||
# shellcheck disable=SC2034
|
||||
APP_BASE_NAME=${0##*/}
|
||||
# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
|
||||
APP_HOME=$( cd "${APP_HOME:-./}" > /dev/null && pwd -P ) || exit
|
||||
|
||||
# Use the maximum available, or set MAX_FD != -1 to use that value.
|
||||
MAX_FD=maximum
|
||||
|
||||
warn () {
|
||||
echo "$*"
|
||||
} >&2
|
||||
|
||||
die () {
|
||||
echo
|
||||
echo "$*"
|
||||
echo
|
||||
exit 1
|
||||
} >&2
|
||||
|
||||
# OS specific support (must be 'true' or 'false').
|
||||
cygwin=false
|
||||
msys=false
|
||||
darwin=false
|
||||
nonstop=false
|
||||
case "$( uname )" in #(
|
||||
CYGWIN* ) cygwin=true ;; #(
|
||||
Darwin* ) darwin=true ;; #(
|
||||
MSYS* | MINGW* ) msys=true ;; #(
|
||||
NONSTOP* ) nonstop=true ;;
|
||||
esac
|
||||
|
||||
CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
|
||||
|
||||
|
||||
# Determine the Java command to use to start the JVM.
|
||||
if [ -n "$JAVA_HOME" ] ; then
|
||||
if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
|
||||
# IBM's JDK on AIX uses strange locations for the executables
|
||||
JAVACMD=$JAVA_HOME/jre/sh/java
|
||||
else
|
||||
JAVACMD=$JAVA_HOME/bin/java
|
||||
fi
|
||||
if [ ! -x "$JAVACMD" ] ; then
|
||||
die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
|
||||
|
||||
Please set the JAVA_HOME variable in your environment to match the
|
||||
location of your Java installation."
|
||||
fi
|
||||
else
|
||||
JAVACMD=java
|
||||
if ! command -v java >/dev/null 2>&1
|
||||
then
|
||||
die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
|
||||
|
||||
Please set the JAVA_HOME variable in your environment to match the
|
||||
location of your Java installation."
|
||||
fi
|
||||
fi
|
||||
|
||||
# Increase the maximum file descriptors if we can.
|
||||
if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
|
||||
case $MAX_FD in #(
|
||||
max*)
|
||||
# In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
|
||||
# shellcheck disable=SC2039,SC3045
|
||||
MAX_FD=$( ulimit -H -n ) ||
|
||||
warn "Could not query maximum file descriptor limit"
|
||||
esac
|
||||
case $MAX_FD in #(
|
||||
'' | soft) :;; #(
|
||||
*)
|
||||
# In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
|
||||
# shellcheck disable=SC2039,SC3045
|
||||
ulimit -n "$MAX_FD" ||
|
||||
warn "Could not set maximum file descriptor limit to $MAX_FD"
|
||||
esac
|
||||
fi
|
||||
|
||||
# Collect all arguments for the java command, stacking in reverse order:
|
||||
# * args from the command line
|
||||
# * the main class name
|
||||
# * -classpath
|
||||
# * -D...appname settings
|
||||
# * --module-path (only if needed)
|
||||
# * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
|
||||
|
||||
# For Cygwin or MSYS, switch paths to Windows format before running java
|
||||
if "$cygwin" || "$msys" ; then
|
||||
APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
|
||||
CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
|
||||
|
||||
JAVACMD=$( cygpath --unix "$JAVACMD" )
|
||||
|
||||
# Now convert the arguments - kludge to limit ourselves to /bin/sh
|
||||
for arg do
|
||||
if
|
||||
case $arg in #(
|
||||
-*) false ;; # don't mess with options #(
|
||||
/?*) t=${arg#/} t=/${t%%/*} # looks like a POSIX filepath
|
||||
[ -e "$t" ] ;; #(
|
||||
*) false ;;
|
||||
esac
|
||||
then
|
||||
arg=$( cygpath --path --ignore --mixed "$arg" )
|
||||
fi
|
||||
# Roll the args list around exactly as many times as the number of
|
||||
# args, so each arg winds up back in the position where it started, but
|
||||
# possibly modified.
|
||||
#
|
||||
# NB: a `for` loop captures its iteration list before it begins, so
|
||||
# changing the positional parameters here affects neither the number of
|
||||
# iterations, nor the values presented in `arg`.
|
||||
shift # remove old arg
|
||||
set -- "$@" "$arg" # push replacement arg
|
||||
done
|
||||
fi
|
||||
|
||||
|
||||
# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
|
||||
DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
|
||||
|
||||
# Collect all arguments for the java command:
|
||||
# * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
|
||||
# and any embedded shellness will be escaped.
|
||||
# * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
|
||||
# treated as '${Hostname}' itself on the command line.
|
||||
|
||||
set -- \
|
||||
"-Dorg.gradle.appname=$APP_BASE_NAME" \
|
||||
-classpath "$CLASSPATH" \
|
||||
org.gradle.wrapper.GradleWrapperMain \
|
||||
"$@"
|
||||
|
||||
# Stop when "xargs" is not available.
|
||||
if ! command -v xargs >/dev/null 2>&1
|
||||
then
|
||||
die "xargs is not available"
|
||||
fi
|
||||
|
||||
# Use "xargs" to parse quoted args.
|
||||
#
|
||||
# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
|
||||
#
|
||||
# In Bash we could simply go:
|
||||
#
|
||||
# readarray ARGS < <( xargs -n1 <<<"$var" ) &&
|
||||
# set -- "${ARGS[@]}" "$@"
|
||||
#
|
||||
# but POSIX shell has neither arrays nor command substitution, so instead we
|
||||
# post-process each arg (as a line of input to sed) to backslash-escape any
|
||||
# character that might be a shell metacharacter, then use eval to reverse
|
||||
# that process (while maintaining the separation between arguments), and wrap
|
||||
# the whole thing up as a single "set" statement.
|
||||
#
|
||||
# This will of course break if any of these variables contains a newline or
|
||||
# an unmatched quote.
|
||||
#
|
||||
|
||||
eval "set -- $(
|
||||
printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
|
||||
xargs -n1 |
|
||||
sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
|
||||
tr '\n' ' '
|
||||
)" '"$@"'
|
||||
|
||||
exec "$JAVACMD" "$@"
|
||||
Vendored
+92
@@ -0,0 +1,92 @@
|
||||
@rem
|
||||
@rem Copyright 2015 the original author or authors.
|
||||
@rem
|
||||
@rem Licensed under the Apache License, Version 2.0 (the "License");
|
||||
@rem you may not use this file except in compliance with the License.
|
||||
@rem You may obtain a copy of the License at
|
||||
@rem
|
||||
@rem https://www.apache.org/licenses/LICENSE-2.0
|
||||
@rem
|
||||
@rem Unless required by applicable law or agreed to in writing, software
|
||||
@rem distributed under the License is distributed on an "AS IS" BASIS,
|
||||
@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
@rem See the License for the specific language governing permissions and
|
||||
@rem limitations under the License.
|
||||
@rem
|
||||
|
||||
@if "%DEBUG%"=="" @echo off
|
||||
@rem ##########################################################################
|
||||
@rem
|
||||
@rem Gradle startup script for Windows
|
||||
@rem
|
||||
@rem ##########################################################################
|
||||
|
||||
@rem Set local scope for the variables with windows NT shell
|
||||
if "%OS%"=="Windows_NT" setlocal
|
||||
|
||||
set DIRNAME=%~dp0
|
||||
if "%DIRNAME%"=="" set DIRNAME=.
|
||||
@rem This is normally unused
|
||||
set APP_BASE_NAME=%~n0
|
||||
set APP_HOME=%DIRNAME%
|
||||
|
||||
@rem Resolve any "." and ".." in APP_HOME to make it shorter.
|
||||
for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
|
||||
|
||||
@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
|
||||
set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
|
||||
|
||||
@rem Find java.exe
|
||||
if defined JAVA_HOME goto findJavaFromJavaHome
|
||||
|
||||
set JAVA_EXE=java.exe
|
||||
%JAVA_EXE% -version >NUL 2>&1
|
||||
if %ERRORLEVEL% equ 0 goto execute
|
||||
|
||||
echo. 1>&2
|
||||
echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
|
||||
echo. 1>&2
|
||||
echo Please set the JAVA_HOME variable in your environment to match the 1>&2
|
||||
echo location of your Java installation. 1>&2
|
||||
|
||||
goto fail
|
||||
|
||||
:findJavaFromJavaHome
|
||||
set JAVA_HOME=%JAVA_HOME:"=%
|
||||
set JAVA_EXE=%JAVA_HOME%/bin/java.exe
|
||||
|
||||
if exist "%JAVA_EXE%" goto execute
|
||||
|
||||
echo. 1>&2
|
||||
echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
|
||||
echo. 1>&2
|
||||
echo Please set the JAVA_HOME variable in your environment to match the 1>&2
|
||||
echo location of your Java installation. 1>&2
|
||||
|
||||
goto fail
|
||||
|
||||
:execute
|
||||
@rem Setup the command line
|
||||
|
||||
set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
|
||||
|
||||
|
||||
@rem Execute Gradle
|
||||
"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
|
||||
|
||||
:end
|
||||
@rem End local scope for the variables with windows NT shell
|
||||
if %ERRORLEVEL% equ 0 goto mainEnd
|
||||
|
||||
:fail
|
||||
rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
|
||||
rem the _cmd.exe /c_ return code!
|
||||
set EXIT_CODE=%ERRORLEVEL%
|
||||
if %EXIT_CODE% equ 0 set EXIT_CODE=1
|
||||
if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
|
||||
exit /b %EXIT_CODE%
|
||||
|
||||
:mainEnd
|
||||
if "%OS%"=="Windows_NT" endlocal
|
||||
|
||||
:omega
|
||||
@@ -0,0 +1 @@
|
||||
rootProject.name = "session"
|
||||
@@ -0,0 +1,74 @@
|
||||
package dev.selimaj.session;
|
||||
|
||||
import com.fasterxml.jackson.databind.JsonNode;
|
||||
import com.fasterxml.jackson.databind.node.TextNode;
|
||||
|
||||
import dev.selimaj.session.types.SessionResult;
|
||||
import dev.selimaj.session.types.Message;
|
||||
import dev.selimaj.session.types.Method;
|
||||
import dev.selimaj.session.types.MethodHandler;
|
||||
|
||||
import java.net.URI;
|
||||
import java.net.http.HttpClient;
|
||||
import java.net.http.WebSocket;
|
||||
import java.util.concurrent.CompletableFuture;
|
||||
|
||||
public final class Session {
|
||||
|
||||
private final WebSocket ws;
|
||||
private final SessionListener listener;
|
||||
|
||||
public Session(WebSocket ws, SessionListener listener) {
|
||||
this.ws = ws;
|
||||
this.listener = listener;
|
||||
}
|
||||
|
||||
public static Session connect(String uri) throws Exception {
|
||||
SessionListener listener = new SessionListener();
|
||||
|
||||
WebSocket ws = HttpClient.newHttpClient()
|
||||
.newWebSocketBuilder()
|
||||
.buildAsync(URI.create(uri), listener)
|
||||
.join();
|
||||
|
||||
return new Session(ws, listener);
|
||||
}
|
||||
|
||||
public void send(Message msg) throws Exception {
|
||||
listener.send(ws, msg);
|
||||
}
|
||||
|
||||
public void respond(int to, JsonNode val) throws Exception {
|
||||
listener.respond(ws, to, val);
|
||||
}
|
||||
|
||||
public void respondError(int to, JsonNode val) throws Exception {
|
||||
listener.respondError(ws, to, val);
|
||||
}
|
||||
|
||||
public void notify(String method, Object data) throws Exception {
|
||||
listener.notify(ws, method, data);
|
||||
}
|
||||
|
||||
<Req extends JsonNode, Res extends JsonNode, Err extends JsonNode> CompletableFuture<Res> request(
|
||||
Method<Req, Res, Err> method, Req req) throws Exception {
|
||||
return listener.request(ws, method.getName(), req, method.getResClass());
|
||||
}
|
||||
|
||||
<Req extends JsonNode, Res extends JsonNode, Err extends JsonNode> void onRequest(Method<Req, Res, Err> method,
|
||||
MethodHandler<Req> handler) {
|
||||
MethodHandler<JsonNode> wrapper = (id, value) -> {
|
||||
try {
|
||||
return handler.handle(id, listener.mapper.treeToValue(value, method.getReqClass()));
|
||||
} catch (Exception e) {
|
||||
return SessionResult.error(TextNode.valueOf(e.getMessage()));
|
||||
}
|
||||
};
|
||||
|
||||
this.listener.methods.put(method.getName(), wrapper);
|
||||
}
|
||||
|
||||
public void close() throws Exception {
|
||||
ws.sendClose(0, "Session closed");
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,103 @@
|
||||
package dev.selimaj.session;
|
||||
|
||||
import java.net.http.WebSocket;
|
||||
import java.util.concurrent.CompletableFuture;
|
||||
import java.util.concurrent.CompletionStage;
|
||||
import java.util.concurrent.ConcurrentHashMap;
|
||||
import java.util.concurrent.atomic.AtomicInteger;
|
||||
|
||||
import com.fasterxml.jackson.databind.JsonNode;
|
||||
import com.fasterxml.jackson.databind.ObjectMapper;
|
||||
|
||||
import dev.selimaj.session.types.Message;
|
||||
import dev.selimaj.session.types.MethodHandler;
|
||||
|
||||
public class SessionListener implements WebSocket.Listener {
|
||||
public final ConcurrentHashMap<String, MethodHandler<JsonNode>> methods = new ConcurrentHashMap<>();
|
||||
|
||||
final ObjectMapper mapper = new ObjectMapper();
|
||||
private final ConcurrentHashMap<Integer, CompletableFuture<JsonNode>> pending = new ConcurrentHashMap<>();
|
||||
private final AtomicInteger id = new AtomicInteger();
|
||||
|
||||
@Override
|
||||
public CompletionStage<?> onText(WebSocket ws, CharSequence data, boolean last) {
|
||||
Message msg = null;
|
||||
|
||||
try {
|
||||
msg = mapper.readValue(data.toString(), Message.class);
|
||||
} catch (Exception e) {
|
||||
e.printStackTrace();
|
||||
return null;
|
||||
}
|
||||
|
||||
if (msg instanceof Message.Request r) {
|
||||
MethodHandler<JsonNode> handler = methods.get(r.method());
|
||||
|
||||
if (handler != null) {
|
||||
handler.handle(r.id(), r.data())
|
||||
.thenAccept(res -> {
|
||||
try {
|
||||
if (res.isError()) {
|
||||
respondError(ws, r.id(), res.value());
|
||||
} else {
|
||||
respond(ws, r.id(), res.value());
|
||||
}
|
||||
} catch (Exception ignored) {
|
||||
}
|
||||
});
|
||||
}
|
||||
} else if (msg instanceof Message.Response r) {
|
||||
CompletableFuture<JsonNode> fut = pending.remove(r.id());
|
||||
if (fut != null)
|
||||
fut.complete(r.result());
|
||||
} else if (msg instanceof Message.ErrorResponse r) {
|
||||
CompletableFuture<JsonNode> fut = pending.remove(r.id());
|
||||
if (fut != null)
|
||||
fut.completeExceptionally(
|
||||
new RuntimeException(r.error().toString()));
|
||||
}
|
||||
|
||||
return null;
|
||||
}
|
||||
|
||||
void send(WebSocket ws, Message msg) throws Exception {
|
||||
ws.sendText(mapper.writeValueAsString(msg), true);
|
||||
}
|
||||
|
||||
void respond(WebSocket ws, int to, JsonNode val) throws Exception {
|
||||
send(ws, new Message.Response(to, val));
|
||||
}
|
||||
|
||||
void respondError(WebSocket ws, int to, JsonNode val) throws Exception {
|
||||
send(ws, new Message.ErrorResponse(to, val));
|
||||
}
|
||||
|
||||
void notify(WebSocket ws, String method, Object data) throws Exception {
|
||||
send(ws, new Message.Notification(method, mapper.valueToTree(data)));
|
||||
}
|
||||
|
||||
<Req, Res> CompletableFuture<Res> request(
|
||||
WebSocket ws,
|
||||
String method,
|
||||
Req data,
|
||||
Class<Res> resType) throws Exception {
|
||||
|
||||
int id = this.id.incrementAndGet();
|
||||
|
||||
CompletableFuture<JsonNode> fut = new CompletableFuture<>();
|
||||
pending.put(id, fut);
|
||||
|
||||
send(ws, new Message.Request(
|
||||
id,
|
||||
method,
|
||||
mapper.valueToTree(data)));
|
||||
|
||||
return fut.thenApply(json -> {
|
||||
try {
|
||||
return mapper.treeToValue(json, resType);
|
||||
} catch (Exception e) {
|
||||
throw new RuntimeException(e);
|
||||
}
|
||||
});
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,27 @@
|
||||
package dev.selimaj.session.types;
|
||||
|
||||
import com.fasterxml.jackson.annotation.*;
|
||||
import com.fasterxml.jackson.databind.JsonNode;
|
||||
|
||||
@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.PROPERTY, property = "type")
|
||||
@JsonSubTypes({
|
||||
@JsonSubTypes.Type(value = Message.Request.class, name = "request"),
|
||||
@JsonSubTypes.Type(value = Message.Response.class, name = "response"),
|
||||
@JsonSubTypes.Type(value = Message.ErrorResponse.class, name = "errorresponse"),
|
||||
@JsonSubTypes.Type(value = Message.Notification.class, name = "notification")
|
||||
})
|
||||
public sealed interface Message
|
||||
permits Message.Request, Message.Response, Message.ErrorResponse, Message.Notification {
|
||||
|
||||
record Request(int id, String method, JsonNode data) implements Message {
|
||||
}
|
||||
|
||||
record Response(int id, JsonNode result) implements Message {
|
||||
}
|
||||
|
||||
record ErrorResponse(int id, JsonNode error) implements Message {
|
||||
}
|
||||
|
||||
record Notification(String method, JsonNode data) implements Message {
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,33 @@
|
||||
package dev.selimaj.session.types;
|
||||
|
||||
import com.fasterxml.jackson.databind.JsonNode;
|
||||
|
||||
public class Method<Req extends JsonNode, Res extends JsonNode, Err extends JsonNode> {
|
||||
private final String name;
|
||||
private final Class<Req> reqClass;
|
||||
private final Class<Res> resClass;
|
||||
private final Class<Err> errClass;
|
||||
|
||||
public Method(String name, Class<Req> reqClass, Class<Res> resClass, Class<Err> errClass) {
|
||||
this.name = name;
|
||||
this.reqClass = reqClass;
|
||||
this.resClass = resClass;
|
||||
this.errClass = errClass;
|
||||
}
|
||||
|
||||
public String getName() {
|
||||
return name;
|
||||
}
|
||||
|
||||
public Class<Req> getReqClass() {
|
||||
return reqClass;
|
||||
}
|
||||
|
||||
public Class<Res> getResClass() {
|
||||
return resClass;
|
||||
}
|
||||
|
||||
public Class<Err> getErrClass() {
|
||||
return errClass;
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,10 @@
|
||||
package dev.selimaj.session.types;
|
||||
|
||||
import java.util.concurrent.CompletableFuture;
|
||||
|
||||
import com.fasterxml.jackson.databind.JsonNode;
|
||||
|
||||
@FunctionalInterface
|
||||
public interface MethodHandler<Req extends JsonNode> {
|
||||
CompletableFuture<SessionResult> handle(int id, Req data);
|
||||
}
|
||||
@@ -0,0 +1,15 @@
|
||||
package dev.selimaj.session.types;
|
||||
|
||||
import java.util.concurrent.CompletableFuture;
|
||||
|
||||
import com.fasterxml.jackson.databind.JsonNode;
|
||||
|
||||
public record SessionResult(boolean isError, JsonNode value) {
|
||||
public static CompletableFuture<SessionResult> ok(JsonNode value) {
|
||||
return CompletableFuture.completedFuture(new SessionResult(false, value));
|
||||
}
|
||||
|
||||
public static CompletableFuture<SessionResult> error(JsonNode value) {
|
||||
return CompletableFuture.completedFuture(new SessionResult(false, value));
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,10 @@
|
||||
package dev.selimaj.session;
|
||||
|
||||
import com.fasterxml.jackson.databind.node.TextNode;
|
||||
|
||||
import dev.selimaj.session.types.Method;
|
||||
|
||||
public class Methods {
|
||||
public static final Method<TextNode, TextNode, TextNode> Data = new Method<>("data",
|
||||
TextNode.class, TextNode.class, TextNode.class);
|
||||
}
|
||||
@@ -0,0 +1,35 @@
|
||||
package dev.selimaj.session;
|
||||
|
||||
import org.junit.jupiter.api.Test;
|
||||
|
||||
import com.fasterxml.jackson.databind.node.TextNode;
|
||||
import dev.selimaj.session.types.SessionResult;
|
||||
|
||||
public class SessionTest {
|
||||
static void testRequest() throws Exception {
|
||||
Session session = Session.connect("ws://localhost:8080/");
|
||||
|
||||
session.onRequest(Methods.Data, (id, data) -> {
|
||||
return SessionResult.ok(TextNode.valueOf("Response from client"));
|
||||
});
|
||||
|
||||
TextNode response = session.request(Methods.Data, TextNode.valueOf("Hello from client")).get();
|
||||
|
||||
System.out.println(response);
|
||||
|
||||
session.close();
|
||||
}
|
||||
|
||||
@Test
|
||||
void requestTest() throws Exception {
|
||||
testRequest();
|
||||
}
|
||||
|
||||
public static void main(String[] args) {
|
||||
try {
|
||||
testRequest();
|
||||
} catch (Exception e) {
|
||||
e.printStackTrace();
|
||||
}
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user