无法解析符号 RetryHttpInitializerWrapper - Google IOT

Question

我正在尝试在 google 云上的 IOT 平台中创建一个设备。当按照说明和示例进行操作时，我得到 "Cannot resolve symbol "RetryHttpInitializerWrapper”。我检查了我是否有最新的 Maven 版本，用 JDK 11 和 8 进行了测试，并搜索了有同样问题的人。

Link转google云导：https://cloud.google.com/iot/docs/how-tos/devices#iot-core-create-rs256-java

Link 到 google Github: https://github.com/GoogleCloudPlatform/java-docs-samples/blob/master/iot/api-client/manager/src/main/java/com/example/cloud/iot/examples/DeviceRegistryExample.java

在我的代码中，唯一的问题在于第 57 行，我尝试在 "createDevice"

方法下创建一个新的 "RetryHttpInitializerWrapper"

这是我的方法：

public static void createDevice(
        String projectId, String cloudRegion, String registryName, String deviceId)
        throws GeneralSecurityException, IOException {
    // [START create_device]
    GoogleCredential credential =
            GoogleCredential.getApplicationDefault().createScoped(CloudIotScopes.all());
    JsonFactory jsonFactory = JacksonFactory.getDefaultInstance();
    HttpRequestInitializer init = new RetryHttpInitializerWrapper(credential);
    final CloudIot service =
            new CloudIot.Builder(GoogleNetHttpTransport.newTrustedTransport(), jsonFactory, init)
                    .setApplicationName(APP_NAME)
                    .build();

    final String registryPath =
            String.format(
                    "projects/%s/locations/%s/registries/%s", projectId, cloudRegion, registryName);

    List<Device> devices =
            service
                    .projects()
                    .locations()
                    .registries()
                    .devices()
                    .list(registryPath)
                    .setFieldMask("config,gatewayConfig")
                    .execute()
                    .getDevices();

    if (devices != null) {
        System.out.println("Found " + devices.size() + " devices");
        for (Device d : devices) {
            if ((d.getId() != null && d.getId().equals(deviceId))
                    || (d.getName() != null && d.getName().equals(deviceId))) {
                System.out.println("Device exists, skipping.");
                return;
            }
        }
    }

}

这是我的导入：

import com.google.api.client.googleapis.auth.oauth2.GoogleCredential;
import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
import com.google.api.client.http.HttpRequestInitializer;
import com.google.api.client.json.JsonFactory;
import com.google.api.client.json.jackson2.JacksonFactory;
import com.google.api.services.cloudiot.v1.CloudIot;
import com.google.api.services.cloudiot.v1.CloudIotScopes;
import com.google.api.services.cloudiot.v1.model.Device;
import com.google.cloud.Role;
import com.google.cloud.pubsub.v1.TopicAdminClient;
import com.google.iam.v1.Binding;
import com.google.pubsub.v1.Topic;
import com.google.pubsub.v1.TopicName;

import java.io.IOException;
import java.security.GeneralSecurityException;
import java.util.List;

我的 POM.xml 文件如下所示：

<?xml version="1.0" encoding="UTF-8"?>

http://maven.apache.org/xsd/maven-4.0.0.xsd"> 4.0.0

<groupId>no.something</groupId>
<artifactId>MQTTbridge</artifactId>
<version>11.0</version>
<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <configuration>
                <source>7</source>
                <target>7</target>
            </configuration>
        </plugin>
    </plugins>
</build>

<dependencies>
    <dependency>
        <groupId>org.eclipse.paho</groupId>
        <artifactId>org.eclipse.paho.client.mqttv3</artifactId>
        <version>1.2.0</version>
    </dependency>
    <dependency>
        <groupId>com.google.api.grpc</groupId>
        <artifactId>proto-google-cloud-pubsub-v1</artifactId>
        <version>0.1.19</version>
    </dependency>
    <dependency>
        <groupId>com.google.cloud</groupId>
        <artifactId>google-cloud-pubsub</artifactId>
        <version>0.24.0-beta</version>
    </dependency>
    <dependency>
        <groupId>com.google.api-client</groupId>
        <artifactId>google-api-client</artifactId>
        <version>LATEST</version>
    </dependency>
    <dependency>
        <groupId>com.google.apis</groupId>
        <artifactId>google-api-services-cloudiot</artifactId>
        <version>v1-rev20181120-1.27.0</version>
    </dependency>
</dependencies>

Answer 1

您拥有的任何 Maven 依赖项中似乎都不存在 class RetryHttpInitializerWrapper.class。我还查看了 java-docs-samples 在 github 中引用的 Maven 存储库，但它似乎也没有被推送到那里。您可以查看 Google 在 Github 上的 RetryHttpInitializerWrapper 示例实现，并可能创建您自己的：

https://github.com/GoogleCloudPlatform/java-docs-samples/blob/master/storage/storage-transfer/src/main/java/com/google/cloud/storage/storagetransfer/samples/RetryHttpInitializerWrapper.java

无法解析符号 RetryHttpInitializerWrapper - Google IOT

Cannot resolve symbol RetryHttpInitializerWrapper - Google IOT

java

maven

google-cloud-platform

iot