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本篇文章給大家分享的是有關使用java的milo框架訪問OPCUA服務的過程是怎樣的,小編覺得挺實用的,因此分享給大家學習,希望大家閱讀完這篇文章后可以有所收獲,話不多說,跟著小編一起來看看吧。
本次采用KEPServerEX5模擬服務端,使用milo開發的程序作為客戶端
設置通道、設備、標簽
設置訪問的用戶名和密碼
設置通過opc-ua訪問的節點
1、在pom文件中追擊以下依賴
<!--start milo--> <dependency> <groupId>org.eclipse.milo</groupId> <artifactId>sdk-client</artifactId> <version>0.2.4</version> </dependency> <dependency> <groupId>org.bouncycastle</groupId> <artifactId>bcpkix-jdk15on</artifactId> <version>1.57</version> </dependency> <dependency> <groupId>org.eclipse.milo</groupId> <artifactId>sdk-server</artifactId> <version>0.2.4</version> </dependency> <!--end milo-->
2、OPC UA協議對象接口
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協議對象接口 */ public interface OpcUAClientService { /** * OPC UA服務器地址和接口 */ default String getEndpointUrl() { return "opc.tcp://127.0.0.1:49320"; } /** * 過濾返回的server endpoint */ default Predicate<EndpointDescription> endpointFilter() { return e -> true; } /** * 連接服務器的安全策略 * None、Basic128Rsa15、Basic256、Basic256Sha256、Aes128_Sha256_RsaOaep、Aes256_Sha256_RsaPss */ default SecurityPolicy getSecurityPolicy() { return SecurityPolicy.None; } /** * 提供身份驗證 */ default IdentityProvider getIdentityProvider() { return new AnonymousProvider(); } /** * 實際操作服務、由實現類重寫實現 */ void run(OpcUaClient client, CompletableFuture<OpcUaClient> future) throws Exception; }
3、OPC UA協議對象實體類
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 { /** * 覆蓋接口的方法,建立和OPC UA的服務 */ @Override public void run(OpcUaClient client, CompletableFuture<OpcUaClient> future) throws Exception { // 同步建立連接 client.connect().get(); // 異步讀取數據 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); }); } /** * 讀取標簽點的數據 */ private CompletableFuture<List<DataValue>> readTagData(OpcUaClient client) { NodeId nodeId_Tag1 = new NodeId(2, "Channel1.Device1.Tag1"); NodeId nodeId_Tag2 = new NodeId(2, "Channel1.Device1.Tag2"); List<NodeId> nodeIds = ImmutableList.of(nodeId_Tag1, nodeId_Tag2); return client.readValues(0.0, TimestampsToReturn.Both, nodeIds); } }
4、OPC UA協議運行對象
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 java.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<OpcUaClient> future = new CompletableFuture<>(); private final OpcUAClientService opcUAClientService; public OpcUAClientRunner(OpcUAClientService opcUAClientService) { this.opcUAClientService = opcUAClientService; } /** * OPC UA的運行入口程序 */ public void run() { try { // 創建OPC UA客戶端 OpcUaClient opcUaClient = createClient(); // future執行完畢后,異步判斷狀態 future.whenCompleteAsync((c, ex) -> { if (ex != null) { logger.error("連接OPC UA服務錯誤: {}", ex.getMessage(), ex); } // 關閉OPC UA客戶端 try { opcUaClient.disconnect().get(); Stack.releaseSharedResources(); } catch (InterruptedException | ExecutionException e) { logger.error("OPC UA服務關閉錯誤: {}", e.getMessage(), e); } }); try { // 獲取OPC UA服務器的數據 opcUAClientService.run(opcUaClient, future); future.get(5, TimeUnit.SECONDS); } catch (Throwable t) { logger.error("OPC UA客戶端運行錯誤: {}", t.getMessage(), t); future.completeExceptionally(t); } } catch (Throwable t) { logger.error("OPC UA客戶端創建錯誤: {}", t.getMessage(), t); future.completeExceptionally(t); } } /** * 創建OPC UA的服務連接對象 */ 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("不能夠創建安全路徑: " + securityTempDir); } KeyStoreLoader loader = new KeyStoreLoader().load(securityTempDir); // 獲取OPC UA的服務器端節點 EndpointDescription[] endpoints = UaTcpStackClient.getEndpoints(opcUAClientService.getEndpointUrl()).get(); EndpointDescription endpoint = Arrays.stream(endpoints) .filter(e -> e.getEndpointUrl().equals(opcUAClientService.getEndpointUrl())) .findFirst().orElseThrow(() -> new Exception("沒有節點返回")); // 設置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(); // 創建OPC UA客戶端 return new OpcUaClient(config); } }
5、OPC UA訪問證書類
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])$"); // 證書別名 private static final String CLIENT_ALIAS = "client-ai"; // 獲取私鑰的密碼 private static final char[] PASSWORD = "password".toCharArray(); // 證書對象 private X509Certificate clientCertificate; // 密鑰對對象 private KeyPair clientKeyPair; KeyStoreLoader load(Path baseDir) throws Exception { // 創建一個使用`PKCS12`加密標準的KeyStore。KeyStore在后面將作為讀取和生成證書的對象。 KeyStore keyStore = KeyStore.getInstance("PKCS12"); // PKCS12的加密標準的文件后綴是.pfx,其中包含了公鑰和私鑰。 // 而其他如.der等的格式只包含公鑰,私鑰在另外的文件中。 Path serverKeyStore = baseDir.resolve("example-client.pfx"); logger.info("Loading KeyStore at {}", serverKeyStore); // 如果文件不存在則創建.pfx證書文件。 if (!Files.exists(serverKeyStore)) { keyStore.load(null, PASSWORD); // 用2048位的RAS算法。`SelfSignedCertificateGenerator`為Milo庫的對象。 KeyPair keyPair = SelfSignedCertificateGenerator.generateRsaKeyPair(2048); // `SelfSignedCertificateBuilder`也是Milo庫的對象,用來生成證書。 // 中間所設置的證書屬性可以自行修改。 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); } } // 創建證書 X509Certificate certificate = builder.build(); // 設置對應私鑰的別名,密碼,證書鏈 keyStore.setKeyEntry(CLIENT_ALIAS, keyPair.getPrivate(), PASSWORD, new X509Certificate[]{certificate}); try (OutputStream out = Files.newOutputStream(serverKeyStore)) { // 保存證書到輸出流 keyStore.store(out, PASSWORD); } } else { try (InputStream in = Files.newInputStream(serverKeyStore)) { // 如果文件存在則讀取 keyStore.load(in, PASSWORD); } } // 用密碼獲取對應別名的私鑰。 Key serverPrivateKey = keyStore.getKey(CLIENT_ALIAS, PASSWORD); if (serverPrivateKey instanceof PrivateKey) { // 獲取對應別名的證書對象。 clientCertificate = (X509Certificate) keyStore.getCertificate(CLIENT_ALIAS); // 獲取公鑰 PublicKey serverPublicKey = clientCertificate.getPublicKey(); // 創建Keypair對象。 clientKeyPair = new KeyPair(serverPublicKey, (PrivateKey) serverPrivateKey); } return this; } // 返回證書 X509Certificate getClientCertificate() { return clientCertificate; } // 返回密鑰對 KeyPair getClientKeyPair() { return clientKeyPair; } }
6、業務service類
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 * 獲取二期發電數據(三、四號機組) */ @Service("phase2Service") public class Phase2ServiceImpl implements Phase2Service { @Autowired private OpcUAClientService opcUAClientService; /** * 獲取二期發電數據(三、四號機組),保存到數據庫中 */ @Override public void searchPhase2ElectricData() { new OpcUAClientRunner(opcUAClientService).run(); } }
7、業務Controller類、定時調度
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 * 獲取二期發電數據(三、四號機組) */ @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; /** * 獲取二期發電數據(三、四號機組),保存到數據庫中(x分鐘調度一次) */ @Scheduled(initialDelay = 30000, fixedRate = 30000) public void searchGasData() { logger.info("####獲取二期發電數據(三、四號機組) - 定時任務執行時間:"+ dateFormat.format(new Date())); phase2Service.searchPhase2ElectricData(); } }
8、運行結果、定時獲取到opcua服務中的數據
OK,以上是所有的源代碼,大家的問題基本能夠解決。
以上就是使用java的milo框架訪問OPCUA服務的過程是怎樣的,小編相信有部分知識點可能是我們日常工作會見到或用到的。希望你能通過這篇文章學到更多知識。更多詳情敬請關注億速云行業資訊頻道。
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