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/*
 * Copyright 2008-2009 the original author or 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
 *
 *      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.
 */
package net.hasor.tconsole;
import net.hasor.core.ApiBinder;
import net.hasor.core.BindInfo;
import net.hasor.core.TypeSupplier;
import net.hasor.core.aop.AsmTools;
import net.hasor.core.exts.aop.Matchers;

import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.Reader;
import java.io.Writer;
import java.lang.reflect.Constructor;
import java.lang.reflect.Modifier;
import java.net.InetSocketAddress;
import java.net.UnknownHostException;
import java.nio.charset.StandardCharsets;
import java.util.Arrays;
import java.util.Objects;
import java.util.Set;
import java.util.function.Function;
import java.util.function.Predicate;
import java.util.function.Supplier;
import java.util.stream.Stream;

import static net.hasor.tconsole.launcher.TelUtils.finalBindAddress;

/**
 * tConsole 插件接口
 * @version : 2019年10月30日
 * @author 赵永春 ([email protected])
 */
public interface ConsoleApiBinder extends ApiBinder {
    /**
     * 创建一个 Host 模式的 Tel 命令交互界面,并使用标准输入输出流作为数据交换通道。
     * 提示:使用标准输入输出流作为消息通道的情况下会自动启用 answerExit
     */
    public default HostBuilder asHostWithSTDO() {
        return asHost(new InputStreamReader(System.in), new OutputStreamWriter(System.out, StandardCharsets.UTF_8)).answerExit();
    }

    /**
     * 跟随环境,启动 Telnet 的模式交给其它地方决定。这里只负责注册命令。
     */
    public TelnetBuilder asHostWithEnv();

    /**
     * 创建一个 Host 模式的 Tel 命令交互界面。
     */
    public HostBuilder asHost(Reader reader, Writer writer);

    /**
     * 创建一个网络 Tel 命令交互界面,使用的协议是 Telnet。
     */
    public default TelnetBuilder asTelnet(String host, int port) throws UnknownHostException {
        return asTelnet(host, port, s -> true);
    }

    /**
     * 创建一个网络 Tel 命令交互界面,使用的协议是 Telnet。
     */
    public default TelnetBuilder asTelnet(String host, int port, Predicate inBoundMatcher) throws UnknownHostException {
        return asTelnet(new InetSocketAddress(finalBindAddress(host), port), inBoundMatcher);
    }

    public TelnetBuilder asTelnet(InetSocketAddress address, Predicate inBoundMatcher);

    public interface HostBuilder extends TelnetBuilder, TelAttribute {
        /** 安静模式,安静模式下不会输"tConsole>" 提示符,也不会输出欢迎信息。 */
        public HostBuilder silent();

        /** 预执行的命令,预执行命令最快会在容器启动之后异步方式执行的。*/
        public HostBuilder preCommand(String... commands);

        /** 响应 exit 指令自动退出容器 */
        public HostBuilder answerExit();
    }

    public interface TelnetBuilder {
        /** 加载带有 @Tel 注解的类。 */
        public default TelnetBuilder loadExecutor(Set> udfTypeSet) {
            return loadExecutor(udfTypeSet, Matchers.anyClass(), null);
        }

        /** 加载带有 @Tel 注解的类 */
        public default void loadExecutor(Class telType) {
            Objects.requireNonNull(telType, "class is null.");
            loadExecutor(telType, null);
        }

        /** 加载带有 @Tel 注解的类。 */
        public default TelnetBuilder loadExecutor(Set> maybeUdfTypeSet, Predicate> matcher, TypeSupplier typeSupplier) {
            if (maybeUdfTypeSet != null && !maybeUdfTypeSet.isEmpty()) {
                maybeUdfTypeSet.stream()//
                        .filter(matcher)//
                        .filter(Matchers.annotatedWithClass(Tel.class))//
                        .forEach(aClass -> loadExecutor(aClass, typeSupplier));
            }
            return this;
        }

        /** 加载带有 @Tel 注解的类 */
        public default  void loadExecutor(Class telType, TypeSupplier typeSupplier) {
            Objects.requireNonNull(telType, "class is null.");
            int modifier = telType.getModifiers();
            if (AsmTools.checkOr(modifier, Modifier.INTERFACE, Modifier.ABSTRACT) || telType.isArray() || telType.isEnum()) {
                throw new IllegalStateException(telType.getName() + " must be normal Bean");
            }
            Tel[] annotationsByType = telType.getAnnotationsByType(Tel.class);
            if (annotationsByType == null || annotationsByType.length == 0) {
                throw new IllegalStateException(telType.getName() + " must be configure @Tel");
            }
            //
            if (TelExecutor.class.isAssignableFrom(telType)) {
                String[] telNames = Arrays.stream(annotationsByType).flatMap((Function>) dimTel -> {
                    return Arrays.stream(dimTel.value());
                }).toArray(String[]::new);
                Class telExecutorType = (Class) telType;
                if (typeSupplier == null) {
                    addExecutor(telNames).to(telExecutorType);
                } else {
                    addExecutor(telNames).toProvider(() -> typeSupplier.get(telExecutorType));
                }
            }
        }

        /** 添加新命令 */
        public CommandBindingBuilder addExecutor(String... names);
    }

    public interface CommandBindingBuilder {
        /** 绑定到一个实现类上 */
        public  void to(Class executorKey);

        /** 绑定到一个构造方法上 */
        public  void toConstructor(Constructor constructor);

        /** 绑定到一个具体对象上 */
        public  void toInstance(T instance);

        /** 绑定到一个提供者上 */
        public  void toProvider(Supplier executorProvider);

        /** 绑定到一个 Info上 */
        public  void toInfo(BindInfo executorInfo);
    }
}




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