fabric-java-sdk 1.4 开发区块链应用程序
苏鹏鹍
一、搭建fabric测试网络
搭建环境可以参考Fabric环境搭建
二、利用fabric-java-sdk开发应用程序
pom文件引入：
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.my.fabric</groupId>
<artifactId>springboot-java-fabric</artifactId>
<version>1.0.0-SNAPSHOT</version>
<packaging>jar</packaging>
<name>springboot-java-fabric</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.5.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
<kotlin.version>1.2.41</kotlin.version>
<model-mapper-version>0.7.5</model-mapper-version>
<jackson.version>2.9.6</jackson.version>
<os.detected.classifier>windows-x86_64</os.detected.classifier>
</properties>
<profiles>
<profile>
<id>staging</id>
<activation>
<property>
<name>staging</name>
<value>true</value>
</property>
</activation>
<properties>
<location>staging</location>
<log_level>debug</log_level>
<zookeeper_use>true</zookeeper_use>
<zookeeper_host>staging</zookeeper_host>
</properties>
<build>
<resources>
<resource>
<directory>src/main/resources</directory>
<filtering>true</filtering>
</resource>
<resource>
<directory>src/main/resources/staging</directory>
<filtering>true</filtering>
</resource>
</resources>
</build>
</profile>
</profiles>
<dependencyManagement>
<dependencies>
<dependency>
<artifactId>jackson-annotations</artifactId>
<groupId>com.fasterxml.jackson.core</groupId>
<version>${jackson.version}</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>${jackson.version}</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>${jackson.version}</version>
</dependency>
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>21.0</version>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
</dependency>
<dependency>
<groupId>org.hyperledger.fabric-sdk-java</groupId>
<artifactId>fabric-sdk-java</artifactId>
<version>1.4.0</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<!-- 移除嵌入式tomcat插件 -->
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</exclusion>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<!--<scope>provided</scope>-->
</dependency>
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-jasper</artifactId>
<!--<scope>provided</scope>-->
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
</dependency>
<!--log-->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.25</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.25</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger2</artifactId>
<version>2.6.1</version>
<exclusions>
<exclusion>
<artifactId>spring-aop</artifactId>
<groupId>org.springframework</groupId>
</exclusion>
<exclusion>
<artifactId>slf4j-api</artifactId>
<groupId>org.slf4j</groupId>
</exclusion>
<exclusion>
<artifactId>spring-beans</artifactId>
<groupId>org.springframework</groupId>
</exclusion>
<exclusion>
<artifactId>spring-context</artifactId>
<groupId>org.springframework</groupId>
</exclusion>
<exclusion>
<artifactId>jackson-annotations</artifactId>
<groupId>com.fasterxml.jackson.core</groupId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger-ui</artifactId>
<version>2.6.1</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.16.18</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>io.netty</groupId>
<artifactId>netty-all</artifactId>
<version>4.1.6.Final</version>
</dependency>
<dependency>
<groupId>org.reflections</groupId>
<artifactId>reflections</artifactId>
<version>0.9.10</version>
<exclusions>
<exclusion>
<artifactId>guava</artifactId>
<groupId>com.google.guava</groupId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
</dependencies>
<build>
<!-- build所需要的资源 -->
<resources>
<resource>
<directory>${project.basedir}/src/main/resources</directory>
<filtering>true</filtering>
<excludes>
<exclude>staging/*</exclude>
<exclude>dev/*</exclude>
<!-- <exclude>log4j.xml</exclude>-->
<exclude>web.xml</exclude>
</excludes>
</resource>
</resources>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.8</source>
<target>1.8</target>
<fork>true</fork>
<verbose>true</verbose>
<encoding>UTF-8</encoding>
</configuration>
</plugin>
<!-- 编译使用1.6 -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<configuration>
<skip>true</skip>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<configuration>
<archive>
<manifestEntries>
<Rose>*</Rose>
</manifestEntries>
</archive>
</configuration>
</plugin>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<executions>
<execution>
<goals>
<goal>repackage</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
搭建spring-boot工程。
三、测试
非常重要的几点：
1、运行区块链测试网络的时候，需要去除TLS通道加密，具体的有修改：
1) 在fabric/scripts/fabric-samples/first-network/base内的两个文件里面分别关掉
docker-compose-base.yaml ---- > ORDERER_GENERAL_TLS_ENABLED=false
peer-base.yaml ---- > CORE_PEER_TLS_ENABLED=false
2) 在fabric/scripts/fabric-samples/first-network/docker-compose-cli.yaml内的文件中关掉 CORE_PEER_TLS_ENABLED=false
3) 将fabric/scripts/fabric-samples/first-network/docker-compose-e2e-template.yaml的文件中关掉 CORE_PEER_TLS_ENABLED=false。
2、运行byfn.sh up命名时，第一次可以看到网络正常运行后，需要关掉执行脚本script/script.sh，因为在这里会自动创建channel，部署链码等，会导致java程序在创建channel的时候，出现异常need version 0, but got version 1.（LZ在这里被坑得很厉害）
3、java程序创建完channel，不能再次创建channel，除非清理掉fabric网络。
4、在运行java程序前，需要将orderer和channel信息拷贝到工程中。
具体的java工程可见：git@github.com:chenweiw09/fabric-java-application.git
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