使用java的milo框架访问OPCUA服务的过程

网友投稿 534 2022-09-04


使用java的milo框架访问OPCUA服务的过程

最近接了一个项目,需要访问工业的实时数据库,数据库的对外开放接口是OPCUA协议的,经过多方比对,发现github上milo的评星较高,尝试了一下,还比较方便好用,现在把使用过程中的坑和大家介绍一下,网上比较全的资料不多,下面是整个过程全部的资料:

本次采用KEPServerEX5模拟服务端,使用milo开发的程序作为客户端

一、搭建服务端,KEPServerEX5的安装省略掉,下面是配置过程

设置通道、设备、标签

设置访问的用户名和密码

设置通过opc-ua访问的节点

二、使用milo的框架,开发客户端访问opcua服务

1、在pom文件中追击以下依赖

org.eclipse.milo

sdk-client

0.2.4

org.bouncycastle

bcpkix-jdk15on

1.57&tvlNfRhefjlt;/version>

org.eclipse.milo

sdk-server

0.2.4

2、OPC UA协议对象接口

package com.jndj.platform.common.milo;

import org.eclipse.milo.opcua.sdk.client.OpcUaClient;

import org.eclipse.milo.opcua.sdk.client.api.identity.AnonymousProvider;

import org.eclipse.milo.opcua.sdk.client.api.identity.IdentityProvider;

import org.eclipse.milo.opcua.stack.core.security.SecurityPolicy;

import org.eclipse.milo.opcua.stack.core.types.structured.EndpointDescription;

import java.util.concurrent.CompletableFuture;

import java.util.function.Predicate;

/**

* @author yaohj

* @date 2020/7/30

* OPC UA协议对象接口

*/

public interface OpcUAClientService {

/**

* OPC UA服务器地址和接口

*/

default String getEndpointUrl() {

return "opc.tcp://127.0.0.1:49320";

}

/**

* 过滤返回的server endpoint

*/

default Predicate endpointFilter() {

return e -> true;

}

/**

* 连接服务器的安全策略

* None、Basic128Rsa15、Basic256、Basic256Sha256、Aes128_Sha256_RsaOaep、Aes256_Sha256_RsaPss

*/

default SecurityPolicy getSecurityPolicy() {

return SecurityPolicy.None;

}

/**

* 提供身份验证

*/

default IdentityProvider getIdentityProvider() {

return new AnonymousProvider();

}

/**

* 实际操作服务、由实现类重写实现

*/

void run(OpcUaClient client, CompletableFuture future) throws Exception;

}

3、OPC UA协议对象实体类

package com.jndj.platform.common.milo;

import com.google.common.collect.ImmutableList;

import org.eclipse.milo.opcua.sdk.client.OpcUaClient;

import org.eclipse.milo.opcua.stack.core.types.builtin.*;

import org.eclipse.milo.opcua.stack.core.types.enumerated.TimestampsToReturn;

import org.springframework.stereotype.Service;

import java.util.List;

import java.util.concurrent.CompletableFuture;

@Service("OpcUAClientService")

public class OpcUAClientServiceImpl implements OpcUAClientService {

/**

* 覆盖接口的方法,建立和OPC UA的服务

*/

@Override

public void run(OpcUaClient client, CompletableFuture future) throws Exception {

// 同步建立连接

client.connect().get();

// 异步读取数据

readTagData(client).thenAccept(values -> {

DataValue nodeId_Tag1 = values.get(0);

DataValue nodeId_Tag2 = values.get(1);

System.out.println("#########Tag1=" + nodeId_Tag1.getValue().getValue());

System.out.println("#########Tag2=" + nodeId_Tag2.getValue().getValue());

future.complete(client);

});

}

/**

* 读取标签点的数据

*/

http://private CompletableFuture> readTagData(OpcUaClient client) {

NodeId nodeId_Tag1 = new NodeId(2, "Channel1.Device1.Tag1");

NodeId nodeId_Tag2 = new NodeId(2, "Channel1.Device1.Tag2");

List nodeIds = ImmutableList.of(nodeId_Tag1, nodeId_Tag2);

return client.readValues(0.0, TimestampsToReturn.Both, nodeIds);

}

}

4、OPC UA协议运行对象

package com.jndj.platform.common.milo;

import org.eclipse.milo.opcua.sdk.client.OpcUaClient;

import org.eclipse.milo.opcua.sdk.client.api.config.OpcUaClientConfig;

import org.eclipse.milo.opcua.sdk.client.api.identity.UsernameProvider;

import org.eclipse.milo.opcua.stack.client.UaTcpStackClient;

import org.eclipse.milo.opcua.stack.core.Stack;

import org.eclipse.milo.opcua.stack.core.types.builtin.LocalizedText;

import org.eclipse.milo.opcua.stack.core.types.structured.EndpointDescription;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import org.springframework.stereotype.Service;

import java.nio.file.Files;

import java.nio.file.Path;

import java.nio.file.Paths;

import javtvlNfRhefja.util.Arrays;

import java.util.concurrent.CompletableFuture;

import java.util.concurrent.ExecutionException;

import java.util.concurrent.TimeUnit;

import static org.eclipse.milo.opcua.stack.core.types.builtin.unsigned.Unsigned.uint;

@Service("OpcUAClientRunner")

public class OpcUAClientRunner {

private final Logger logger = LoggerFactory.getLogger(getClass());

private final CompletableFuture future = new CompletableFuture<>();

private final OpcUAClientService opcUAClientService;

public OpcUAClientRunner(OpcUAClientService opcUAClientService) {

this.opcUAClientService = opcUAClientService;

}

/**

* OPC UA的运行入口程序

*/

public void run() {

try {

// 创建OPC UA客户端

OpcUaClient opcUaClient = createClient();

// future执行完毕后,异步判断状态

future.whenCompleteAsync((c, ex) -> {

if (ex != null) {

logger.error("连接OPC UA服务错误: {}", ex.getMessage(), ex);

}

// 关闭OPC UA客户端

try {

opcUaClient.disconnect().get();

Stack.releaseSharedResources();

} catch (InterruptedException | ExecutionException e) {

logger.error("OPC UA服务关闭错误: {}", e.getMessage(), e);

}

});

try {

// 获取OPC UA服务器的数据

opcUAClientService.run(opcUaClient, future);

future.get(5, TimeUnit.SECONDS);

} catch (Throwable t) {

logger.error("OPC UA客户端运行错误: {}", t.getMessage(), t);

future.completeExceptionally(t);

}

} catch (Throwable t) {

logger.error("OPC UA客户端创建错误: {}", t.getMessage(), t);

future.completeExceptionally(t);

}

}

/**

* 创建OPC UA的服务连接对象

*/

private OpcUaClient createClient() throws Exception {

Path securityTempDir = Paths.get(System.getProperty("java.io.tmpdir"), "security");

Files.createDirectories(securityTempDir);

if (!Files.exists(securityTempDir)) {

throw new Exception("不能够创建安全路径: " + securityTempDir);

}

KeyStoreLoader loader = new KeyStoreLoader().load(securityTempDir);

// 获取OPC UA的服务器端节点

EndpointDescription[] endpoints =

UaTcpStackClient.getEndpoints(opcUAClientService.getEndpointUrl()).get();

EndpointDescription endpoint = Arrays.stream(endpoints)

.filter(e -> e.getEndpointUrl().equals(opcUAClientService.getEndpointUrl()))

.findFirst().orElseThrow(() -> new Exception("没有节点返回"));

// 设置OPC UA的配置信息

OpcUaClientConfig config =

OpcUaClientConfig.builder()

.setApplicationName(LocalizedText.english("OPC UA SCREEN"))

.setApplicationUri("urn:DATA-TRANSFER:OPC UA SCREEN")

.setCertificate(loader.getClientCertificate())

.setKeyPair(loader.getClientKeyPair())

.setEndpoint(endpoint)

.setIdentityProvider(new UsernameProvider("Administrator", "123456"))

.setRequestTimeout(uint(5000))

.build();

// 创建OPC UA客户端

return new OpcUaClient(config);

}

}

5、OPC UA访问证书类

package com.jndj.platform.common.milo;

import org.eclipse.milo.opcua.sdk.server.util.HostnameUtil;

import org.eclipse.milo.opcua.stack.core.util.SelfSignedCertificateBuilder;

import org.eclipse.milo.opcua.stack.core.util.SelfSignedCertificateGenerator;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import java.io.InputStream;

import java.io.OutputStream;

import java.nio.file.Files;

import java.nio.file.Path;

import java.security.*;

import java.security.cert.X509Certificate;

import java.util.regex.Pattern;

class KeyStoreLoader {

private final Logger logger = LoggerFactory.getLogger(getClass());

private static final Pattern IP_ADDR_PATTERN = Pattern.compile(

"^(([01]?\\d\\d?|2[0-4]\\d|25[0-5])\\.){3}([01]?\\d\\d?|2[0-4]\\d|25[0-5])$");

// 证书别名

private static final String CLIENT_ALIAS = "client-ai";

// 获取私钥的密码

private static final char[] PASSWORD = "password".toCharArray();

// 证书对象

private X509Certificate clientCertificate;

// 密钥对对象

private KeyPair clientKeyPair;

KeyStoreLoader load(Path baseDir) throws Exception {

// 创建一个使用`PKCS12`加密标准的KeyStore。KeyStore在后面将作为读取和生成证书的对象。

KeyStore keyStore = KeyStore.getInstance("PKCS12");

// PKCS12的加密标准的文件后缀是.pfx,其中包含了公钥和私钥。

// 而其他如.der等的格式只包含公钥,私钥在另外的文件中。

Path serverKeyStore = baseDir.resolve("example-client.pfx");

logger.info("Loading KeyStore at {}", serverKeyStore);

// 如果文件不存在则创建.pfx证书文件。

if (!Files.exists(serverKeyStore)) {

keyStore.load(null, PASSWORD);

// 用2048位的RAS算法。`SelfSignedCertificateGenerator`为Milo库的对象。

KeyPair keyPair = SelfSignedCertificateGenerator.generateRsaKeyPair(2048);

// `SelfSignedCertificateBuilder`也是Milo库的对象,用来生成证书。

// 中间所设置的证书属性可以自行修改。

SelfSignedCertificateBuilder builder = new SelfSignedCertificateBuilder(keyPair)

.setCommonName("Eclipse Milo Example Client")

.setOrganization("digitalpetri")

.setOrganizationalUnit("dev")

.setLocalityName("Folsom")

.setStateName("CA")

.setCountryCode("US")

.setApplicationUri("urn:eclipse:milo:examples:client")

.addDnsName("localhost")

.addIpAddress("127.0.0.1");

// Get as many hostnames and IP addresses as we can listed in the certificate.

for (String hostname : HostnameUtil.getHostnames("0.0.0.0")) {

if (IP_ADDR_PATTERN.matcher(hostname).matches()) {

builder.addIpAddress(hostname);

} else {

builder.addDnsName(hostname);

}

}

// 创建证书

X509Certificate certificate = builder.build();

// 设置对应私钥的别名,密码,证书链

keyStore.setKeyEntry(CLIENT_ALIAS, keyPair.getPrivate(), PASSWORD, new X509Certificate[]{certificate});

try (OutputStream out = Files.newOutputStream(serverKeyStore)) {

// 保存证书到输出流

keyStore.store(out, PASSWORD);

}

} else {

try (InputStream in = Files.newInputStream(serverKeyStore)) {

// 如果文件存在则读取

keyStore.load(in, PASSWORD);

}

}

// 用密码获取对应别名的私钥。

Key serverPrivateKey = keyStore.getKey(CLIENT_ALIAS, PASSWORD);

if (serverPrivateKey instanceof PrivateKey) {

// 获取对应别名的证书对象。

clientCertificate = (X509Certificate) keyStore.getCertificate(CLIENT_ALIAS);

// 获取公钥

PublicKey serverPublicKey = clientCertificate.getPublicKey();

// 创建Keypair对象。

clientKeyPair = new KeyPair(serverPublicKey, (PrivateKey) serverPrivateKey);

}

return this;

}

// 返回证书

X509Certificate getClientCertificate() {

return clientCertificate;

}

// 返回密钥对

KeyPair getClientKeyPair() {

return clientKeyPair;

}

}

6、业务service类

package com.jndj.platform.phase2.service.impl;

import com.jndj.platform.common.milo.OpcUAClientRunner;

import com.jndj.platform.common.milo.OpcUAClientService;

import com.jndj.platform.phase2.service.Phase2Service;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Service;

/**

* @author yaohj

* @date 2020/7/22

* 获取二期发电数据(三、四号机组)

*/

@Service("phase2Service")

public class Phase2ServiceImpl implements Phase2Service {

@Autowired

private OpcUAClientService opcUAClientService;

/**

* 获取二期发电数据(三、四号机组),保存到数据库中

*/

@Override

public void searchPhase2ElectricData() {

new OpcUAClientRunner(opcUAClientService).run();

}

}

7、业务Controller类、定时调度

package com.jndj.platform.phase2.controller;

import com.jndj.platform.phase2.service.Phase2Service;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.scheduling.annotation.Scheduled;

import org.springframework.stereotype.Controller;

import java.text.SimpleDateFormat;

import java.util.Date;

/**

* @author yaohj

* @date 2020/7/22

* 获取二期发电数据(三、四号机组)

*/

@Controller

public class Phase2Controller {

private static final Logger logger = LoggerFactory.getLogger(Phase2Controller.class);

private static final SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy:mm:dd HH:mm:ss");

@Autowired

private Phase2Service phase2Service;

/**

* 获取二期发电数据(三、四号机组),保存到数据库中(x分钟调度一次)

*/

@Scheduled(initialDelay = 30000, fixedRate = 30000)

public void searchGasData() {

logger.info("####获取二期发电数据(三、四号机组) - 定时任务执行时间:"+ dateFormat.format(new Date()));

phase2Service.searchPhase2ElectricData();

}

}

8、运行结果、定时获取到opcua服务中的数据

OK,以上是所有的源代码,大家的问题基本能够解决。


版权声明:本文内容由网络用户投稿,版权归原作者所有,本站不拥有其著作权,亦不承担相应法律责任。如果您发现本站中有涉嫌抄袭或描述失实的内容,请联系我们jiasou666@gmail.com 处理,核实后本网站将在24小时内删除侵权内容。

上一篇:【原创】Python 极验滑块验证
下一篇:python 爬取手机app的信息(python下载安装教程)
相关文章

 发表评论

暂时没有评论,来抢沙发吧~