mirror of
https://github.com/vanitasvitae/Smack.git
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db385e6595
This commit will allow users to plug their module descriptors inside modular architecture.
168 lines
7 KiB
Java
168 lines
7 KiB
Java
/**
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*
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* Copyright 2019-2020 Florian Schmaus
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jivesoftware.smack.c2s;
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import java.io.PrintWriter;
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import java.io.StringWriter;
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import java.lang.reflect.Constructor;
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import java.lang.reflect.InvocationTargetException;
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import java.util.Arrays;
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import java.util.Collections;
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import java.util.HashMap;
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import java.util.HashSet;
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import java.util.Map;
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import java.util.Set;
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import org.jivesoftware.smack.ConnectionConfiguration;
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import org.jivesoftware.smack.SmackConfiguration;
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import org.jivesoftware.smack.fsm.StateDescriptor;
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import org.jivesoftware.smack.fsm.StateDescriptorGraph;
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import org.jivesoftware.smack.fsm.StateDescriptorGraph.GraphVertex;
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import org.jivesoftware.smack.util.CollectionUtil;
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public final class ModularXmppClientToServerConnectionConfiguration extends ConnectionConfiguration {
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final Set<ModularXmppClientToServerConnectionModuleDescriptor> moduleDescriptors;
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final GraphVertex<StateDescriptor> initialStateDescriptorVertex;
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private ModularXmppClientToServerConnectionConfiguration(Builder builder) {
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super(builder);
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moduleDescriptors = Collections.unmodifiableSet(CollectionUtil.newSetWith(builder.modulesDescriptors.values()));
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Set<Class<? extends StateDescriptor>> backwardEdgeStateDescriptors = new HashSet<>();
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// Add backward edges from configured connection modules. Note that all state descriptors from module
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// descriptors are backwards edges.
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for (ModularXmppClientToServerConnectionModuleDescriptor moduleDescriptor : moduleDescriptors) {
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Set<Class<? extends StateDescriptor>> moduleStateDescriptors = moduleDescriptor.getStateDescriptors();
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backwardEdgeStateDescriptors.addAll(moduleStateDescriptors);
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}
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try {
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initialStateDescriptorVertex = StateDescriptorGraph.constructStateDescriptorGraph(backwardEdgeStateDescriptors);
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}
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catch (InstantiationException | IllegalAccessException | IllegalArgumentException | InvocationTargetException
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| NoSuchMethodException | SecurityException e) {
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// TODO: Depending on the exact exception thrown, this potentially indicates an invalid connection
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// configuration, e.g. there is no edge from disconnected to connected.
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throw new IllegalStateException(e);
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}
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}
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public void printStateGraphInDotFormat(PrintWriter pw, boolean breakStateName) {
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StateDescriptorGraph.stateDescriptorGraphToDot(Collections.singleton(initialStateDescriptorVertex), pw,
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breakStateName);
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}
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public String getStateGraphInDotFormat() {
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StringWriter sw = new StringWriter();
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PrintWriter pw = new PrintWriter(sw);
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printStateGraphInDotFormat(pw, true);
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return sw.toString();
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}
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public static Builder builder() {
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return new Builder();
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}
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public static final class Builder
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extends ConnectionConfiguration.Builder<Builder, ModularXmppClientToServerConnectionConfiguration> {
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private final Map<Class<? extends ModularXmppClientToServerConnectionModuleDescriptor>, ModularXmppClientToServerConnectionModuleDescriptor> modulesDescriptors = new HashMap<>();
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private Builder() {
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SmackConfiguration.addAllKnownModulesTo(this);
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}
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@Override
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public ModularXmppClientToServerConnectionConfiguration build() {
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return new ModularXmppClientToServerConnectionConfiguration(this);
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}
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public void addModule(ModularXmppClientToServerConnectionModuleDescriptor connectionModule) {
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Class<? extends ModularXmppClientToServerConnectionModuleDescriptor> moduleDescriptorClass = connectionModule.getClass();
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if (modulesDescriptors.containsKey(moduleDescriptorClass)) {
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throw new IllegalArgumentException("A connection module for " + moduleDescriptorClass + " is already configured");
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}
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modulesDescriptors.put(moduleDescriptorClass, connectionModule);
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}
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@SuppressWarnings("unchecked")
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public Builder addModule(Class<? extends ModularXmppClientToServerConnectionModuleDescriptor> moduleClass) {
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Class<?>[] declaredClasses = moduleClass.getDeclaredClasses();
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Class<? extends ModularXmppClientToServerConnectionModuleDescriptor.Builder> builderClass = null;
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for (Class<?> declaredClass : declaredClasses) {
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if (!ModularXmppClientToServerConnectionModuleDescriptor.Builder.class.isAssignableFrom(declaredClass)) {
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continue;
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}
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builderClass = (Class<? extends ModularXmppClientToServerConnectionModuleDescriptor.Builder>) declaredClass;
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break;
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}
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if (builderClass == null) {
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throw new IllegalArgumentException(
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"Found no builder for " + moduleClass + ". Delcared classes: " + Arrays.toString(declaredClasses));
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}
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return with(builderClass).buildModule();
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}
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public <B extends ModularXmppClientToServerConnectionModuleDescriptor.Builder> B with(
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Class<? extends B> moduleDescriptorBuilderClass) {
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Constructor<? extends B> moduleDescriptorBuilderCosntructor;
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try {
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moduleDescriptorBuilderCosntructor = moduleDescriptorBuilderClass.getDeclaredConstructor(
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ModularXmppClientToServerConnectionConfiguration.Builder.class);
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} catch (NoSuchMethodException | SecurityException e) {
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throw new IllegalArgumentException(e);
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}
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moduleDescriptorBuilderCosntructor.setAccessible(true);
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B moduleDescriptorBuilder;
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try {
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moduleDescriptorBuilder = moduleDescriptorBuilderCosntructor.newInstance(this);
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} catch (InstantiationException | IllegalAccessException | IllegalArgumentException
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| InvocationTargetException e) {
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throw new IllegalArgumentException(e);
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}
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return moduleDescriptorBuilder;
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}
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public Builder removeModule(Class<? extends ModularXmppClientToServerConnectionModuleDescriptor> moduleClass) {
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modulesDescriptors.remove(moduleClass);
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return getThis();
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}
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public Builder removeAllModules() {
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modulesDescriptors.clear();
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return getThis();
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}
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@Override
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protected Builder getThis() {
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return this;
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}
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}
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}
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