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Camunda 7 Keycloak Identity Provider Plugin including all transitive dependencies
/*
* ====================================================================
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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
*
* http://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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* >> handlerList;
private final List> filters;
private String canonicalHostName;
private LookupRegistry> lookupRegistry;
private IOReactorConfig ioReactorConfig;
private HttpProcessor httpProcessor;
private CharCodingConfig charCodingConfig;
private HttpVersionPolicy versionPolicy;
private H2Config h2Config;
private Http1Config http1Config;
private TlsStrategy tlsStrategy;
private Timeout handshakeTimeout;
private Decorator ioSessionDecorator;
private Callback exceptionCallback;
private IOSessionListener sessionListener;
private H2StreamListener h2StreamListener;
private Http1StreamListener http1StreamListener;
private H2ServerBootstrap() {
this.handlerList = new ArrayList<>();
this.filters = new ArrayList<>();
}
public static H2ServerBootstrap bootstrap() {
return new H2ServerBootstrap();
}
/**
* Sets canonical name (fully qualified domain name) of the server.
*
* @since 5.0
*/
public final H2ServerBootstrap setCanonicalHostName(final String canonicalHostName) {
this.canonicalHostName = canonicalHostName;
return this;
}
/**
* Sets I/O reactor configuration.
*/
public final H2ServerBootstrap setIOReactorConfig(final IOReactorConfig ioReactorConfig) {
this.ioReactorConfig = ioReactorConfig;
return this;
}
/**
* Assigns {@link HttpProcessor} instance.
*/
public final H2ServerBootstrap setHttpProcessor(final HttpProcessor httpProcessor) {
this.httpProcessor = httpProcessor;
return this;
}
/**
* Sets HTTP protocol version policy
*/
public final H2ServerBootstrap setVersionPolicy(final HttpVersionPolicy versionPolicy) {
this.versionPolicy = versionPolicy;
return this;
}
/**
* Sets HTTP/2 protocol parameters
*/
public final H2ServerBootstrap setH2Config(final H2Config h2Config) {
this.h2Config = h2Config;
return this;
}
/**
* Sets HTTP/1.1 protocol parameters
*/
public final H2ServerBootstrap setHttp1Config(final Http1Config http1Config) {
this.http1Config = http1Config;
return this;
}
/**
* Sets message char coding.
*/
public final H2ServerBootstrap setCharset(final CharCodingConfig charCodingConfig) {
this.charCodingConfig = charCodingConfig;
return this;
}
/**
* Assigns {@link TlsStrategy} instance.
*/
public final H2ServerBootstrap setTlsStrategy(final TlsStrategy tlsStrategy) {
this.tlsStrategy = tlsStrategy;
return this;
}
public final H2ServerBootstrap setHandshakeTimeout(final Timeout handshakeTimeout) {
this.handshakeTimeout = handshakeTimeout;
return this;
}
/**
* Assigns {@link IOSession} {@link Decorator} instance.
*/
public final H2ServerBootstrap setIOSessionDecorator(final Decorator ioSessionDecorator) {
this.ioSessionDecorator = ioSessionDecorator;
return this;
}
/**
* Assigns {@link Exception} {@link Callback} instance.
*/
public final H2ServerBootstrap setExceptionCallback(final Callback exceptionCallback) {
this.exceptionCallback = exceptionCallback;
return this;
}
/**
* Assigns {@link IOSessionListener} instance.
*/
public final H2ServerBootstrap setIOSessionListener(final IOSessionListener sessionListener) {
this.sessionListener = sessionListener;
return this;
}
/**
* Assigns {@link H2StreamListener} instance.
*/
public final H2ServerBootstrap setStreamListener(final H2StreamListener h2StreamListener) {
this.h2StreamListener = h2StreamListener;
return this;
}
/**
* Assigns {@link Http1StreamListener} instance.
*/
public final H2ServerBootstrap setStreamListener(final Http1StreamListener http1StreamListener) {
this.http1StreamListener = http1StreamListener;
return this;
}
/**
* Assigns {@link LookupRegistry} instance.
*/
public final H2ServerBootstrap setLookupRegistry(final LookupRegistry> lookupRegistry) {
this.lookupRegistry = lookupRegistry;
return this;
}
/**
* Registers the given {@link AsyncServerExchangeHandler} {@link Supplier} as a default handler for URIs
* matching the given pattern.
*
* @param uriPattern the pattern to register the handler for.
* @param supplier the handler supplier.
*/
public final H2ServerBootstrap register(final String uriPattern, final Supplier supplier) {
Args.notBlank(uriPattern, "URI pattern");
Args.notNull(supplier, "Supplier");
handlerList.add(new HandlerEntry<>(null, uriPattern, supplier));
return this;
}
/**
* Registers the given {@link AsyncServerExchangeHandler} {@link Supplier} as a handler for URIs
* matching the given host and the pattern.
*
* @param hostname the host name
* @param uriPattern the pattern to register the handler for.
* @param supplier the handler supplier.
*/
public final H2ServerBootstrap registerVirtual(final String hostname, final String uriPattern, final Supplier supplier) {
Args.notBlank(hostname, "Hostname");
Args.notBlank(uriPattern, "URI pattern");
Args.notNull(supplier, "Supplier");
handlerList.add(new HandlerEntry<>(hostname, uriPattern, supplier));
return this;
}
/**
* Registers the given {@link AsyncServerRequestHandler} as a default handler for URIs
* matching the given pattern.
*
* @param uriPattern the pattern to register the handler for.
* @param requestHandler the handler.
*/
public final H2ServerBootstrap register(
final String uriPattern,
final AsyncServerRequestHandler requestHandler) {
register(uriPattern, () -> new BasicServerExchangeHandler<>(requestHandler));
return this;
}
/**
* Registers the given {@link AsyncServerRequestHandler} as a handler for URIs
* matching the given host and the pattern.
*
* @param hostname the host name
* @param uriPattern the pattern to register the handler for.
* @param requestHandler the handler.
*/
public final H2ServerBootstrap registerVirtual(
final String hostname,
final String uriPattern,
final AsyncServerRequestHandler requestHandler) {
registerVirtual(hostname, uriPattern, () -> new BasicServerExchangeHandler<>(requestHandler));
return this;
}
/**
* Adds the filter before the filter with the given name.
*/
public final H2ServerBootstrap addFilterBefore(final String existing, final String name, final AsyncFilterHandler filterHandler) {
Args.notBlank(existing, "Existing");
Args.notBlank(name, "Name");
Args.notNull(filterHandler, "Filter handler");
filters.add(new FilterEntry<>(FilterEntry.Position.BEFORE, name, filterHandler, existing));
return this;
}
/**
* Adds the filter after the filter with the given name.
*/
public final H2ServerBootstrap addFilterAfter(final String existing, final String name, final AsyncFilterHandler filterHandler) {
Args.notBlank(existing, "Existing");
Args.notBlank(name, "Name");
Args.notNull(filterHandler, "Filter handler");
filters.add(new FilterEntry<>(FilterEntry.Position.AFTER, name, filterHandler, existing));
return this;
}
/**
* Replace an existing filter with the given name with new filter.
*/
public final H2ServerBootstrap replaceFilter(final String existing, final AsyncFilterHandler filterHandler) {
Args.notBlank(existing, "Existing");
Args.notNull(filterHandler, "Filter handler");
filters.add(new FilterEntry<>(FilterEntry.Position.REPLACE, existing, filterHandler, existing));
return this;
}
/**
* Add an filter to the head of the processing list.
*/
public final H2ServerBootstrap addFilterFirst(final String name, final AsyncFilterHandler filterHandler) {
Args.notNull(name, "Name");
Args.notNull(filterHandler, "Filter handler");
filters.add(new FilterEntry<>(FilterEntry.Position.FIRST, name, filterHandler, null));
return this;
}
/**
* Add an filter to the tail of the processing list.
*/
public final H2ServerBootstrap addFilterLast(final String name, final AsyncFilterHandler filterHandler) {
Args.notNull(name, "Name");
Args.notNull(filterHandler, "Filter handler");
filters.add(new FilterEntry<>(FilterEntry.Position.LAST, name, filterHandler, null));
return this;
}
public HttpAsyncServer create() {
final String actualCanonicalHostName = canonicalHostName != null ? canonicalHostName : InetAddressUtils.getCanonicalLocalHostName();
final RequestHandlerRegistry> registry = new RequestHandlerRegistry<>(
actualCanonicalHostName,
() -> lookupRegistry != null ? lookupRegistry :
UriPatternType.newMatcher(UriPatternType.URI_PATTERN));
for (final HandlerEntry> entry: handlerList) {
registry.register(entry.hostname, entry.uriPattern, entry.handler);
}
final HandlerFactory handlerFactory;
if (!filters.isEmpty()) {
final NamedElementChain filterChainDefinition = new NamedElementChain<>();
filterChainDefinition.addLast(
new TerminalAsyncServerFilter(new DefaultAsyncResponseExchangeHandlerFactory(registry)),
StandardFilter.MAIN_HANDLER.name());
filterChainDefinition.addFirst(
new AsyncServerExpectationFilter(),
StandardFilter.EXPECT_CONTINUE.name());
for (final FilterEntry entry: filters) {
switch (entry.position) {
case AFTER:
filterChainDefinition.addAfter(entry.existing, entry.filterHandler, entry.name);
break;
case BEFORE:
filterChainDefinition.addBefore(entry.existing, entry.filterHandler, entry.name);
break;
case REPLACE:
filterChainDefinition.replace(entry.existing, entry.filterHandler);
break;
case FIRST:
filterChainDefinition.addFirst(entry.filterHandler, entry.name);
break;
case LAST:
// Don't add last, after TerminalAsyncServerFilter, as that does not delegate to the chain
// Instead, add the filter just before it, making it effectively the last filter
filterChainDefinition.addBefore(StandardFilter.MAIN_HANDLER.name(), entry.filterHandler, entry.name);
break;
}
}
NamedElementChain.Node current = filterChainDefinition.getLast();
AsyncServerFilterChainElement execChain = null;
while (current != null) {
execChain = new AsyncServerFilterChainElement(current.getValue(), execChain);
current = current.getPrevious();
}
handlerFactory = new AsyncServerFilterChainExchangeHandlerFactory(execChain, exceptionCallback);
} else {
handlerFactory = new DefaultAsyncResponseExchangeHandlerFactory(registry, handler -> new BasicAsyncServerExpectationDecorator(handler, exceptionCallback));
}
final ServerH2StreamMultiplexerFactory http2StreamHandlerFactory = new ServerH2StreamMultiplexerFactory(
httpProcessor != null ? httpProcessor : H2Processors.server(),
handlerFactory,
h2Config != null ? h2Config : H2Config.DEFAULT,
charCodingConfig != null ? charCodingConfig : CharCodingConfig.DEFAULT,
h2StreamListener);
final TlsStrategy actualTlsStrategy = tlsStrategy != null ? tlsStrategy : new H2ServerTlsStrategy();
final ServerHttp1StreamDuplexerFactory http1StreamHandlerFactory = new ServerHttp1StreamDuplexerFactory(
httpProcessor != null ? httpProcessor : HttpProcessors.server(),
handlerFactory,
http1Config != null ? http1Config : Http1Config.DEFAULT,
charCodingConfig != null ? charCodingConfig : CharCodingConfig.DEFAULT,
DefaultConnectionReuseStrategy.INSTANCE,
DefaultHttpRequestParserFactory.INSTANCE,
DefaultHttpResponseWriterFactory.INSTANCE,
DefaultContentLengthStrategy.INSTANCE,
DefaultContentLengthStrategy.INSTANCE,
http1StreamListener);
final IOEventHandlerFactory ioEventHandlerFactory = new ServerHttpProtocolNegotiationStarter(
http1StreamHandlerFactory,
http2StreamHandlerFactory,
versionPolicy != null ? versionPolicy : HttpVersionPolicy.NEGOTIATE,
actualTlsStrategy,
handshakeTimeout);
return new HttpAsyncServer(ioEventHandlerFactory, ioReactorConfig, ioSessionDecorator, exceptionCallback,
sessionListener, actualCanonicalHostName);
}
}