Amazon Web Services 文档中描述的 Amazon Web Services 服务或功能可能因区域而异。要查看适用于中国区域的差异，请参阅中国的 Amazon Web Services 服务入门。本文属于机器翻译版本。若本译文内容与英语原文存在差异，则一律以英文原文为准。
创建使用流管理器的自定义组件
在自定义 Greengrass 组件中使用流管理器来存储、处理和导出 IoT 设备数据。使用本节中的过程和示例创建与流管理器配合使用的组件配方、工件和应用程序。有关如何开发和测试组件的详细信息，请参阅CreateAmazon IoT Greengrass组件.
定义使用直播管理器的组件配方
要在自定义组件中使用流管理器，必须定义aws.greengrass.StreamManager组件作为依赖项。您还必须提供 Stream Manager SDK。完成以下任务，以您选择的语言下载并使用 Stream Manager SDK。
适用于 Java 的 Stream Manager SDK 作为 JAR 文件提供，您可以使用该文件来编译组件。然后，您可以创建包含 Stream Manager SDK 的应用程序 JAR，将应用程序 JAR 定义为组件工件，然后在组件生命周期中运行应用程序 JAR。
使用适用于 Java 的流管理器 SDK
-
下载适用于 Java JAR 文件的流管理器 SDK.
-
执行以下操作之一，从 Java 应用程序和 Stream Manager SDK JAR 文件创建组件工件：
您的组件配方可能与以下示例类似。此组件运行的修改版本StreamManagerS3.java例如，在哪里StreamManagerS3.jar包括流管理器 SDK JAR。
- JSON
-
{
"RecipeFormatVersion": "2020-01-25",
"ComponentName": "com.example.StreamManagerS3Java",
"ComponentVersion": "1.0.0",
"ComponentDescription": "Uses stream manager to upload a file to an S3 bucket.",
"ComponentPublisher": "Amazon",
"ComponentDependencies": {
"aws.greengrass.StreamManager": {
"VersionRequirement": "^2.0.0"
}
},
"Manifests": [
{
"Lifecycle": {
"Run": "java -jar {artifacts:path}/StreamManagerS3.jar"
},
"Artifacts": [
{
"URI": "s3://DOC-EXAMPLE-BUCKET/artifacts/com.example.StreamManagerS3Java/1.0.0/StreamManagerS3.jar"
}
]
}
]
}
- YAML
-
---
RecipeFormatVersion: '2020-01-25'
ComponentName: com.example.StreamManagerS3Java
ComponentVersion: 1.0.0
ComponentDescription: Uses stream manager to upload a file to an S3 bucket.
ComponentPublisher: Amazon
ComponentDependencies:
aws.greengrass.StreamManager:
VersionRequirement: "^2.0.0"
Manifests:
- Lifecycle:
Run: java -jar {artifacts:path}/StreamManagerS3.jar
Artifacts:
- URI: s3://DOC-EXAMPLE-BUCKET/artifacts/com.example.StreamManagerS3Java/1.0.0/StreamManagerS3.jar
有关如何开发和测试组件的详细信息，请参阅CreateAmazon IoT Greengrass组件.
适用于 Python 的 Stream Manager SDK 可作为源代码提供，您可以包含在组件中。创建 Stream Manager SDK 的 ZIP 文件，将 ZIP 文件定义为组件工件，然后在组件生命周期中安装 SDK 的要求。
使用适用于 Python 的流管理器 SDK
-
克隆或下载aws-绿草流管理器-sdk-python存储库。
git clone git@github.com:aws-greengrass/aws-greengrass-stream-manager-sdk-python.git
-
创建一个包含stream_manager文件夹，其中包含适用于 Python 的 Stream Manager SDK 的源代码。您可以将此 ZIP 文件作为组件工件提供，Amazon IoT Greengrass核心软件在安装组件时解压。执行以下操作：
-
打开包含您在上一步中克隆或下载的存储库的文件夹。
cd aws-greengrass-stream-manager-sdk-python
-
邮政编stream_manager文件夹到名为的 ZIP 文件中stream_manager_sdk.zip.
- Linux or Unix
-
zip -rv stream_manager_sdk.zip stream_manager
- Windows Command Prompt (CMD)
-
tar -acvf stream_manager_sdk.zip stream_manager
- PowerShell
-
Compress-Archive stream_manager stream_manager_sdk.zip
-
确认stream_manager_sdk.zip此文件包含stream_managerfolder 及其内容。运行以下命令以列出 ZIP 文件的内容。
- Linux or Unix
-
unzip -l stream_manager_sdk.zip
- Windows Command Prompt (CMD)
-
tar -tf stream_manager_sdk.zip
该输出值应该类似于以下内容。
Archive: aws-greengrass-stream-manager-sdk-python/stream_manager.zip
Length Date Time Name
--------- ---------- ----- ----
0 02-24-2021 20:45 stream_manager/
913 02-24-2021 20:45 stream_manager/__init__.py
9719 02-24-2021 20:45 stream_manager/utilinternal.py
1412 02-24-2021 20:45 stream_manager/exceptions.py
1004 02-24-2021 20:45 stream_manager/util.py
0 02-24-2021 20:45 stream_manager/data/
254463 02-24-2021 20:45 stream_manager/data/__init__.py
26515 02-24-2021 20:45 stream_manager/streammanagerclient.py
--------- -------
294026 8 files
-
将 Stream Manager SDK 工件复制到组件的工件文件夹中。除了 Stream Manager SDK ZIP 文件之外，您的组件还使用 SDK 的requirements.txt文件来安装 Stream Manager SDK 的依赖关系。Replace~/ 绿草组件使用您用于本地开发的文件夹的路径。
- Linux or Unix
-
cp {stream_manager_sdk.zip,requirements.txt} ~/greengrass-components/artifacts/com.example.StreamManagerS3Python/1.0.0/
- Windows Command Prompt (CMD)
-
robocopy . %USERPROFILE%\greengrass-components\artifacts\com.example.StreamManagerS3Python\1.0.0 stream_manager_sdk.zip
robocopy . %USERPROFILE%\greengrass-components\artifacts\com.example.StreamManagerS3Python\1.0.0 requirements.txt
- PowerShell
-
cp .\stream_manager_sdk.zip,.\requirements.txt ~\greengrass-components\artifacts\com.example.StreamManagerS3Python\1.0.0\
-
创建你的组件配方。在配方中，请执行以下操作：
-
定义stream_manager_sdk.zip和requirements.txt作为构件。
-
将你的 Python 应用程序定义为工件。
-
在安装生命周期中，从中安装 Stream Manager SDK 要求requirements.txt.
-
在运行生命周期中，将 Stream Manager SDK 附加到PYTHONPATH，然后运行你的 Python 应用程序。
您的组件配方可能与以下示例类似。此组件运行stream_manager_s3.py示例。
- JSON
-
{
"RecipeFormatVersion": "2020-01-25",
"ComponentName": "com.example.StreamManagerS3Python",
"ComponentVersion": "1.0.0",
"ComponentDescription": "Uses stream manager to upload a file to an S3 bucket.",
"ComponentPublisher": "Amazon",
"ComponentDependencies": {
"aws.greengrass.StreamManager": {
"VersionRequirement": "^2.0.0"
}
},
"Manifests": [
{
"Platform": {
"os": "linux"
},
"Lifecycle": {
"Install": "pip3 install --user -r {artifacts:path}/requirements.txt",
"Run": "export PYTHONPATH=$PYTHONPATH:{artifacts:decompressedPath}/stream_manager_sdk; python3 {artifacts:path}/stream_manager_s3.py"
},
"Artifacts": [
{
"URI": "s3://DOC-EXAMPLE-BUCKET/artifacts/com.example.StreamManagerS3Python/1.0.0/stream_manager_sdk.zip",
"Unarchive": "ZIP"
},
{
"URI": "s3://DOC-EXAMPLE-BUCKET/artifacts/com.example.StreamManagerS3Python/1.0.0/stream_manager_s3.py"
},
{
"URI": "s3://DOC-EXAMPLE-BUCKET/artifacts/com.example.StreamManagerS3Python/1.0.0/requirements.txt"
}
]
},
{
"Platform": {
"os": "windows"
},
"Lifecycle": {
"Install": "pip3 install --user -r {artifacts:path}/requirements.txt",
"Run": "set \"PYTHONPATH=%PYTHONPATH%;{artifacts:decompressedPath}/stream_manager_sdk\" & py -3 {artifacts:path}/stream_manager_s3.py"
},
"Artifacts": [
{
"URI": "s3://DOC-EXAMPLE-BUCKET/artifacts/com.example.StreamManagerS3Python/1.0.0/stream_manager_sdk.zip",
"Unarchive": "ZIP"
},
{
"URI": "s3://DOC-EXAMPLE-BUCKET/artifacts/com.example.StreamManagerS3Python/1.0.0/stream_manager_s3.py"
},
{
"URI": "s3://DOC-EXAMPLE-BUCKET/artifacts/com.example.StreamManagerS3Python/1.0.0/requirements.txt"
}
]
}
]
}
- YAML
-
---
RecipeFormatVersion: '2020-01-25'
ComponentName: com.example.StreamManagerS3Python
ComponentVersion: 1.0.0
ComponentDescription: Uses stream manager to upload a file to an S3 bucket.
ComponentPublisher: Amazon
ComponentDependencies:
aws.greengrass.StreamManager:
VersionRequirement: "^2.0.0"
Manifests:
- Platform:
os: linux
Lifecycle:
Install: pip3 install --user -r {artifacts:path}/requirements.txt
Run: |
export PYTHONPATH=$PYTHONPATH:{artifacts:decompressedPath}/stream_manager_sdk
python3 {artifacts:path}/stream_manager_s3.py
Artifacts:
- URI: s3://DOC-EXAMPLE-BUCKET/artifacts/com.example.StreamManagerS3Python/1.0.0/stream_manager_sdk.zip
Unarchive: ZIP
- URI: s3://DOC-EXAMPLE-BUCKET/artifacts/com.example.StreamManagerS3Python/1.0.0/stream_manager_s3.py
- URI: s3://DOC-EXAMPLE-BUCKET/artifacts/com.example.StreamManagerS3Python/1.0.0/requirements.txt
- Platform:
os: windows
Lifecycle:
Install: pip3 install --user -r {artifacts:path}/requirements.txt
Run: |
set "PYTHONPATH=%PYTHONPATH%;{artifacts:decompressedPath}/stream_manager_sdk"
py -3 {artifacts:path}/stream_manager_s3.py
Artifacts:
- URI: s3://DOC-EXAMPLE-BUCKET/artifacts/com.example.StreamManagerS3Python/1.0.0/stream_manager_sdk.zip
Unarchive: ZIP
- URI: s3://DOC-EXAMPLE-BUCKET/artifacts/com.example.StreamManagerS3Python/1.0.0/stream_manager_s3.py
- URI: s3://DOC-EXAMPLE-BUCKET/artifacts/com.example.StreamManagerS3Python/1.0.0/requirements.txt
有关如何开发和测试组件的详细信息，请参阅CreateAmazon IoT Greengrass组件.
适用于的直播管理器 SDK JavaScript 可以包括在组件中的源代码。创建 Stream Manager SDK 的 ZIP 文件，将 ZIP 文件定义为组件工件，然后在组件生命周期中安装 SDK。
使用适用于 JavaScript 的直播管理器 SDK
-
克隆或下载aws-Greengrass 流管理器-sdk-js存储库。
git clone git@github.com:aws-greengrass/aws-greengrass-stream-manager-sdk-js.git
-
创建一个包含aws-greengrass-stream-manager-sdk文件夹，其中包含适用于 JavaScript 的流管理器 SDK 的源代码。您可以将此 ZIP 文件作为组件工件提供，Amazon IoT Greengrass核心软件在安装组件时解压。执行以下操作：
-
打开包含您在上一步中克隆或下载的存储库的文件夹。
cd aws-greengrass-stream-manager-sdk-js
-
邮政编aws-greengrass-stream-manager-sdk文件夹到名为的 ZIP 文件中stream-manager-sdk.zip.
- Linux or Unix
-
zip -rv stream-manager-sdk.zip aws-greengrass-stream-manager-sdk
- Windows Command Prompt (CMD)
-
tar -acvf stream-manager-sdk.zip aws-greengrass-stream-manager-sdk
- PowerShell
-
Compress-Archive aws-greengrass-stream-manager-sdk stream-manager-sdk.zip
-
确认stream-manager-sdk.zip此文件包含aws-greengrass-stream-manager-sdkfolder 及其内容。运行以下命令以列出 ZIP 文件的内容。
- Linux or Unix
-
unzip -l stream-manager-sdk.zip
- Windows Command Prompt (CMD)
-
tar -tf stream-manager-sdk.zip
该输出值应该类似于以下内容。
Archive: stream-manager-sdk.zip
Length Date Time Name
--------- ---------- ----- ----
0 02-24-2021 22:36 aws-greengrass-stream-manager-sdk/
369 02-24-2021 22:36 aws-greengrass-stream-manager-sdk/package.json
1017 02-24-2021 22:36 aws-greengrass-stream-manager-sdk/util.js
8374 02-24-2021 22:36 aws-greengrass-stream-manager-sdk/utilInternal.js
1937 02-24-2021 22:36 aws-greengrass-stream-manager-sdk/exceptions.js
0 02-24-2021 22:36 aws-greengrass-stream-manager-sdk/data/
353343 02-24-2021 22:36 aws-greengrass-stream-manager-sdk/data/index.js
22599 02-24-2021 22:36 aws-greengrass-stream-manager-sdk/client.js
216 02-24-2021 22:36 aws-greengrass-stream-manager-sdk/index.js
--------- -------
387855 9 files
-
将 Stream Manager SDK 工件复制到组件的工件文件夹中。Replace~/ 绿草组件使用您用于本地开发的文件夹的路径。
- Linux or Unix
-
cp stream-manager-sdk.zip ~/greengrass-components/artifacts/com.example.StreamManagerS3JS/1.0.0/
- Windows Command Prompt (CMD)
-
robocopy . %USERPROFILE%\greengrass-components\artifacts\com.example.StreamManagerS3JS\1.0.0 stream-manager-sdk.zip
- PowerShell
-
cp .\stream-manager-sdk.zip ~\greengrass-components\artifacts\com.example.StreamManagerS3JS\1.0.0\
-
创建你的组件配方。在配方中，请执行以下操作：
-
定义stream-manager-sdk.zip作为神器。
-
定义您的 JavaScript 应用程序作为工件。
-
在安装生命周期中，从stream-manager-sdk.zip构件。该npm
install创建命令node_modules包含流管理器开发工具包及其依赖项的文件夹。
-
在运行生命周期中，追加node_modules到的文件夹NODE_PATH，然后运行您的 JavaScript 应用程序.
您的组件配方可能与以下示例类似。此组件运行直播管理器 3示例。
- JSON
-
{
"RecipeFormatVersion": "2020-01-25",
"ComponentName": "com.example.StreamManagerS3JS",
"ComponentVersion": "1.0.0",
"ComponentDescription": "Uses stream manager to upload a file to an S3 bucket.",
"ComponentPublisher": "Amazon",
"ComponentDependencies": {
"aws.greengrass.StreamManager": {
"VersionRequirement": "^2.0.0"
}
},
"Manifests": [
{
"Platform": {
"os": "linux"
},
"Lifecycle": {
"Install": "npm install {artifacts:decompressedPath}/stream-manager-sdk/aws-greengrass-stream-manager-sdk",
"Run": "export NODE_PATH=$NODE_PATH:{work:path}/node_modules; node {artifacts:path}/index.js"
},
"Artifacts": [
{
"URI": "s3://DOC-EXAMPLE-BUCKET/artifacts/com.example.StreamManagerS3JS/1.0.0/stream-manager-sdk.zip",
"Unarchive": "ZIP"
},
{
"URI": "s3://DOC-EXAMPLE-BUCKET/artifacts/com.example.StreamManagerS3JS/1.0.0/index.js"
}
]
},
{
"Platform": {
"os": "windows"
},
"Lifecycle": {
"Install": "npm install {artifacts:decompressedPath}/stream-manager-sdk/aws-greengrass-stream-manager-sdk",
"Run": "set \"NODE_PATH=%NODE_PATH%;{work:path}/node_modules\" & node {artifacts:path}/index.js"
},
"Artifacts": [
{
"URI": "s3://DOC-EXAMPLE-BUCKET/artifacts/com.example.StreamManagerS3JS/1.0.0/stream-manager-sdk.zip",
"Unarchive": "ZIP"
},
{
"URI": "s3://DOC-EXAMPLE-BUCKET/artifacts/com.example.StreamManagerS3JS/1.0.0/index.js"
}
]
}
]
}
- YAML
-
---
RecipeFormatVersion: '2020-01-25'
ComponentName: com.example.StreamManagerS3JS
ComponentVersion: 1.0.0
ComponentDescription: Uses stream manager to upload a file to an S3 bucket.
ComponentPublisher: Amazon
ComponentDependencies:
aws.greengrass.StreamManager:
VersionRequirement: "^2.0.0"
Manifests:
- Platform:
os: linux
Lifecycle:
Install: npm install {artifacts:decompressedPath}/stream-manager-sdk/aws-greengrass-stream-manager-sdk
Run: |
export NODE_PATH=$NODE_PATH:{work:path}/node_modules
node {artifacts:path}/index.js
Artifacts:
- URI: s3://DOC-EXAMPLE-BUCKET/artifacts/com.example.StreamManagerS3JS/1.0.0/stream-manager-sdk.zip
Unarchive: ZIP
- URI: s3://DOC-EXAMPLE-BUCKET/artifacts/com.example.StreamManagerS3JS/1.0.0/index.js
- Platform:
os: windows
Lifecycle:
Install: npm install {artifacts:decompressedPath}/stream-manager-sdk/aws-greengrass-stream-manager-sdk
Run: |
set "NODE_PATH=%NODE_PATH%;{work:path}/node_modules"
node {artifacts:path}/index.js
Artifacts:
- URI: s3://DOC-EXAMPLE-BUCKET/artifacts/com.example.StreamManagerS3JS/1.0.0/stream-manager-sdk.zip
Unarchive: ZIP
- URI: s3://DOC-EXAMPLE-BUCKET/artifacts/com.example.StreamManagerS3JS/1.0.0/index.js
有关如何开发和测试组件的详细信息，请参阅CreateAmazon IoT Greengrass组件.
在应用代码中 Connect 到直播管理器
要连接到应用程序中的流管理器，请创建一个实例StreamManagerClient来自直播管理器 SDK。此客户端连接到默认端口 8088 或您指定的端口上的流管理器组件。有关如何使用的详细信息StreamManagerClient创建实例后，请参阅使用 StreamManagerClient 处理流.
例如：使用默认端口 Connect 到流管理器
- Java
-
import com.amazonaws.greengrass.streammanager.client.StreamManagerClient;
public class MyStreamManagerComponent {
void connectToStreamManagerWithDefaultPort() {
StreamManagerClient client = StreamManagerClientFactory.standard().build();
// Use the client.
}
}
- Python
-
from stream_manager import (
StreamManagerClient
)
def connect_to_stream_manager_with_default_port():
client = StreamManagerClient()
# Use the client.
- JavaScript
-
const {
StreamManagerClient
} = require('aws-greengrass-stream-manager-sdk');
function connectToStreamManagerWithDefaultPort() {
const client = new StreamManagerClient();
// Use the client.
}
例如：使用非默认端口 Connect 到直播管理器
如果您使用默认端口配置流管理器，则必须使用进程间通信从组件配置中检索端口。
这些区域有：port配置参数包含您在中指定的值STREAM_MANAGER_SERVER_PORT当您部署流管理器时。
- Java
-
void connectToStreamManagerWithCustomPort() {
EventStreamRPCConnection eventStreamRpcConnection = IPCUtils.getEventStreamRpcConnection();
GreengrassCoreIPCClient greengrassCoreIPCClient = new GreengrassCoreIPCClient(eventStreamRpcConnection);
List<String> keyPath = new ArrayList<>();
keyPath.add("port");
GetConfigurationRequest request = new GetConfigurationRequest();
request.setComponentName("aws.greengrass.StreamManager");
request.setKeyPath(keyPath);
GetConfigurationResponse response =
greengrassCoreIPCClient.getConfiguration(request, Optional.empty()).getResponse().get();
String port = response.getValue().get("port").toString();
System.out.print("Stream Manager is running on port: " + port);
final StreamManagerClientConfig config = StreamManagerClientConfig.builder()
.serverInfo(StreamManagerServerInfo.builder().port(Integer.parseInt(port)).build()).build();
StreamManagerClient client = StreamManagerClientFactory.standard().withClientConfig(config).build();
// Use the client.
}
- Python
-
import awsiot.greengrasscoreipc
from awsiot.greengrasscoreipc.model import (
GetConfigurationRequest
)
from stream_manager import (
StreamManagerClient
)
TIMEOUT = 10
def connect_to_stream_manager_with_custom_port():
# Use IPC to get the port from the stream manager component configuration.
ipc_client = awsiot.greengrasscoreipc.connect()
request = GetConfigurationRequest()
request.component_name = "aws.greengrass.StreamManager"
request.key_path = ["port"]
operation = ipc_client.new_get_configuration()
operation.activate(request)
futureResponse = operation.get_response()
response = futureResponse.result(TIMEOUT)
stream_manager_port = str(response.value["port"])
# Use port to create a stream manager client.
stream_client = StreamManagerClient(port=stream_manager_port)
# Use the client.