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The Microsoft Azure IoT Device SDK for Java
// Copyright (c) Microsoft. All rights reserved.
// Licensed under the MIT license. See LICENSE file in the project root for full license information.
package com.microsoft.azure.sdk.iot.device;
import com.microsoft.azure.sdk.iot.device.transport.ExponentialBackoffWithJitter;
import com.microsoft.azure.sdk.iot.device.twin.Pair;
import com.microsoft.azure.sdk.iot.device.auth.*;
import com.microsoft.azure.sdk.iot.device.transport.RetryPolicy;
import com.microsoft.azure.sdk.iot.provisioning.security.SecurityProvider;
import com.microsoft.azure.sdk.iot.provisioning.security.SecurityProviderSymmetricKey;
import com.microsoft.azure.sdk.iot.provisioning.security.SecurityProviderTpm;
import com.microsoft.azure.sdk.iot.provisioning.security.SecurityProviderX509;
import lombok.AccessLevel;
import lombok.Getter;
import lombok.NonNull;
import lombok.Setter;
import lombok.extern.slf4j.Slf4j;
import javax.net.ssl.SSLContext;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import static com.microsoft.azure.sdk.iot.device.IotHubClientProtocol.*;
/**
* Configuration settings for an IoT Hub client. Validates all user-defined
* settings.
*/
@Slf4j
public final class ClientConfiguration
{
private static final int DEFAULT_HTTPS_READ_TIMEOUT_MILLIS = 240000;
private static final int DEFAULT_HTTPS_CONNECT_TIMEOUT_MILLIS = 0; //no connect timeout
public static final int DEFAULT_KEEP_ALIVE_INTERVAL_IN_SECONDS = 230;
public static final int DEFAULT_SEND_INTERVAL_IN_SECONDS = 10;
public static final int DEFAULT_AMQP_OPEN_AUTHENTICATION_SESSION_TIMEOUT_IN_SECONDS = 20;
public static final int DEFAULT_AMQP_OPEN_DEVICE_SESSIONS_TIMEOUT_IN_SECONDS = 60;
public static final int DEFAULT_SEND_INTERVAL_IN_MILLISECONDS = 10;
/** The default value for messageLockTimeoutSecs. */
private static final int DEFAULT_MESSAGE_LOCK_TIMEOUT_SECS = 180;
private static final long DEFAULT_OPERATION_TIMEOUT = 4 * 60 * 1000; //4 minutes
private boolean useWebsocket;
@Getter
@Setter(AccessLevel.PACKAGE)
private ProxySettings proxySettings;
private final String deviceClientUniqueIdentifier = UUID.randomUUID().toString().substring(0,8);
@Getter
@Setter(AccessLevel.PACKAGE)
String modelId;
// Initialize all the timeout values here instead of the constructor as the constructor is not always called.
@Getter
@Setter(AccessLevel.PACKAGE)
private int httpsReadTimeout = DEFAULT_HTTPS_READ_TIMEOUT_MILLIS;
@Getter
@Setter(AccessLevel.PACKAGE)
private int httpsConnectTimeout = DEFAULT_HTTPS_CONNECT_TIMEOUT_MILLIS;
@Getter
@Setter(AccessLevel.PACKAGE)
private int amqpOpenAuthenticationSessionTimeout = DEFAULT_AMQP_OPEN_AUTHENTICATION_SESSION_TIMEOUT_IN_SECONDS;
@Getter
@Setter(AccessLevel.PACKAGE)
private int amqpOpenDeviceSessionsTimeout = DEFAULT_AMQP_OPEN_DEVICE_SESSIONS_TIMEOUT_IN_SECONDS;
@Getter
@Setter(AccessLevel.PACKAGE)
private int keepAliveInterval = DEFAULT_KEEP_ALIVE_INTERVAL_IN_SECONDS;
@Getter
@Setter(AccessLevel.PACKAGE)
private int sendInterval = DEFAULT_SEND_INTERVAL_IN_MILLISECONDS;
private IotHubAuthenticationProvider authenticationProvider;
/**
* The callback to be invoked if a message of Device Method type received.
*/
private MessageCallback directMethodsMessageCallback;
/** The context to be passed in to the device method type message callback. */
private Object directMethodsMessageContext;
/**
* The callback to be invoked if a message of Device Twin type received.
*/
private MessageCallback deviceTwinMessageCallback;
/** The context to be passed in to the device twin type message callback. */
private Object deviceTwinMessageContext;
/**
* The callback to be invoked if a message is received.
*/
private MessageCallback defaultDeviceTelemetryMessageCallback;
/** The context to be passed in to the message callback. */
private Object defaultDeviceTelemetryMessageContext;
private final Map> inputChannelMessageCallbacks = new HashMap<>();
@Getter
private ProductInfo productInfo;
public enum AuthType
{
X509_CERTIFICATE,
SAS_TOKEN
}
@Getter
private long operationTimeout = DEFAULT_OPERATION_TIMEOUT;
@Getter
private final IotHubClientProtocol protocol;
@NonNull
@Getter
@Setter(AccessLevel.PACKAGE)
private RetryPolicy retryPolicy = new ExponentialBackoffWithJitter();
/**
* Constructor
*
* @param iotHubConnectionString is the string with the hostname, deviceId, and
* deviceKey or token, which identify the device in
* the Azure IotHub.
*
* @throws IllegalArgumentException if the IoT Hub hostname does not contain
* a valid IoT Hub name as its prefix.
*/
ClientConfiguration(IotHubConnectionString iotHubConnectionString, IotHubClientProtocol protocol) throws IllegalArgumentException
{
this.protocol = protocol;
configSasAuth(iotHubConnectionString);
}
private void configSasAuth(IotHubConnectionString iotHubConnectionString) {
commonConstructorSetup(iotHubConnectionString);
assertConnectionStringIsNotX509(iotHubConnectionString);
this.authenticationProvider = new IotHubSasTokenSoftwareAuthenticationProvider(
iotHubConnectionString.getHostName(),
iotHubConnectionString.getGatewayHostName(),
iotHubConnectionString.getDeviceId(),
iotHubConnectionString.getModuleId(),
iotHubConnectionString.getSharedAccessKey(),
iotHubConnectionString.getSharedAccessToken());
log.debug("Device configured to use software based SAS authentication provider");
}
ClientConfiguration(IotHubAuthenticationProvider authenticationProvider, IotHubClientProtocol protocol) throws IllegalArgumentException
{
if (!(authenticationProvider instanceof IotHubSasTokenAuthenticationProvider))
{
throw new UnsupportedOperationException("This constructor only support sas token authentication currently");
}
this.protocol = protocol;
this.authenticationProvider = authenticationProvider;
this.useWebsocket = false;
this.productInfo = new ProductInfo();
}
ClientConfiguration(String hostName, SasTokenProvider sasTokenProvider, IotHubClientProtocol protocol, ClientOptions clientOptions, String deviceId, String moduleId)
{
SSLContext sslContext = clientOptions != null ? clientOptions.getSslContext() : null;
this.protocol = protocol;
setClientOptionValues(clientOptions);
this.authenticationProvider =
new IotHubSasTokenProvidedAuthenticationProvider(hostName, deviceId, moduleId, sasTokenProvider, sslContext);
this.useWebsocket = false;
this.productInfo = new ProductInfo();
log.debug("Device configured to use SAS token provided authentication provider");
}
ClientConfiguration(IotHubConnectionString iotHubConnectionString, IotHubClientProtocol protocol, ClientOptions clientOptions)
{
this.protocol = protocol;
if (clientOptions != null && clientOptions.getSslContext() != null)
{
configSsl(iotHubConnectionString, clientOptions.getSslContext());
}
else
{
configSasAuth(iotHubConnectionString);
}
setClientOptionValues(clientOptions);
}
private void setClientOptionValues(ClientOptions clientOptions)
{
this.modelId = clientOptions != null && clientOptions.getModelId() != null ? clientOptions.getModelId() : null;
this.keepAliveInterval = clientOptions != null && clientOptions.getKeepAliveInterval() != 0 ? clientOptions.getKeepAliveInterval() : DEFAULT_KEEP_ALIVE_INTERVAL_IN_SECONDS;
this.httpsReadTimeout = clientOptions != null && clientOptions.getHttpsReadTimeout() != 0 ? clientOptions.getHttpsReadTimeout() : DEFAULT_HTTPS_READ_TIMEOUT_MILLIS;
this.httpsConnectTimeout = clientOptions != null && clientOptions.getHttpsConnectTimeout() != 0 ? clientOptions.getHttpsConnectTimeout() : DEFAULT_HTTPS_CONNECT_TIMEOUT_MILLIS;
this.amqpOpenAuthenticationSessionTimeout = clientOptions != null && clientOptions.getAmqpAuthenticationSessionTimeout() != 0 ? clientOptions.getAmqpAuthenticationSessionTimeout() : DEFAULT_AMQP_OPEN_AUTHENTICATION_SESSION_TIMEOUT_IN_SECONDS;
this.amqpOpenDeviceSessionsTimeout = clientOptions != null && clientOptions.getAmqpDeviceSessionTimeout() != 0 ? clientOptions.getAmqpDeviceSessionTimeout() : DEFAULT_AMQP_OPEN_DEVICE_SESSIONS_TIMEOUT_IN_SECONDS;
this.proxySettings = clientOptions != null && clientOptions.getProxySettings() != null ? clientOptions.getProxySettings() : null;
this.sendInterval = clientOptions != null && clientOptions.getSendInterval() != 0 ? clientOptions.getSendInterval() : DEFAULT_SEND_INTERVAL_IN_MILLISECONDS;
if (proxySettings != null)
{
IotHubClientProtocol protocol = this.getProtocol();
if (protocol != HTTPS && protocol != AMQPS_WS && protocol != MQTT_WS)
{
throw new IllegalArgumentException("Use of proxies is unsupported unless using HTTPS, MQTT_WS or AMQPS_WS");
}
}
if (this.getSasTokenAuthentication() != null && clientOptions != null)
{
if (clientOptions.getSasTokenExpiryTime() <= 0)
{
throw new IllegalArgumentException("ClientOption sasTokenExpiryTime must be greater than 0");
}
this.getSasTokenAuthentication().setTokenValidSecs(clientOptions.getSasTokenExpiryTime());
}
if (this.keepAliveInterval <= 0)
{
throw new IllegalArgumentException("ClientOption keepAliveInterval must be greater than 0");
}
if (this.httpsReadTimeout < 0)
{
throw new IllegalArgumentException("ClientOption httpsReadTimeout must be greater than or equal to 0");
}
if (this.httpsConnectTimeout < 0)
{
throw new IllegalArgumentException("ClientOption httpsConnectTimeout must be greater than or equal to 0");
}
if (this.amqpOpenAuthenticationSessionTimeout <= 0)
{
throw new IllegalArgumentException("ClientOption amqpAuthenticationSessionTimeout must be greater than 0");
}
if (this.amqpOpenDeviceSessionsTimeout <= 0)
{
throw new IllegalArgumentException("ClientOption amqpDeviceSessionTimeout must be greater than 0");
}
}
ClientConfiguration(IotHubConnectionString iotHubConnectionString, IotHubClientProtocol protocol, SSLContext sslContext)
{
this.protocol = protocol;
configSsl(iotHubConnectionString, sslContext);
}
private void configSsl(IotHubConnectionString iotHubConnectionString, SSLContext sslContext) {
commonConstructorSetup(iotHubConnectionString);
if (iotHubConnectionString.isUsingX509())
{
this.authenticationProvider = new IotHubX509SoftwareAuthenticationProvider(
iotHubConnectionString.getHostName(),
iotHubConnectionString.getGatewayHostName(),
iotHubConnectionString.getDeviceId(),
iotHubConnectionString.getModuleId(),
sslContext);
log.debug("Device configured to use software based x509 authentication provider with custom SSLContext");
}
else
{
this.authenticationProvider = new IotHubSasTokenSoftwareAuthenticationProvider(
iotHubConnectionString.getHostName(),
iotHubConnectionString.getGatewayHostName(),
iotHubConnectionString.getDeviceId(),
iotHubConnectionString.getModuleId(),
iotHubConnectionString.getSharedAccessKey(),
iotHubConnectionString.getSharedAccessToken(),
sslContext);
log.debug("Device configured to use software based SAS authentication provider with custom SSLContext");
}
}
/**
* Constructor for a device client config that retrieves the authentication method from a security provider instance
* @param connectionString The connection string for the iot hub to connect with
* @param securityProvider The security provider instance to be used for authentication of this device
* @throws IOException if the provided security provider throws an exception while authenticating
*/
ClientConfiguration(IotHubConnectionString connectionString, SecurityProvider securityProvider, IotHubClientProtocol protocol) throws IOException
{
commonConstructorSetup(connectionString);
this.protocol = protocol;
if (securityProvider == null)
{
throw new IllegalArgumentException("security provider cannot be null");
}
if (securityProvider instanceof SecurityProviderTpm)
{
this.authenticationProvider = new IotHubSasTokenHardwareAuthenticationProvider(
connectionString.getHostName(),
connectionString.getGatewayHostName(),
connectionString.getDeviceId(),
connectionString.getModuleId(),
securityProvider);
}
else if (securityProvider instanceof SecurityProviderSymmetricKey)
{
this.authenticationProvider = new IotHubSasTokenSoftwareAuthenticationProvider(
connectionString.getHostName(),
connectionString.getGatewayHostName(),
connectionString.getDeviceId(),
connectionString.getModuleId(),
new String(((SecurityProviderSymmetricKey) securityProvider).getSymmetricKey(), StandardCharsets.UTF_8),
null);
}
else if (securityProvider instanceof SecurityProviderX509)
{
this.authenticationProvider = new IotHubX509HardwareAuthenticationProvider(
connectionString.getHostName(),
connectionString.getGatewayHostName(),
connectionString.getDeviceId(),
connectionString.getModuleId(),
securityProvider);
}
else
{
throw new UnsupportedOperationException("The provided security provider is not supported.");
}
}
/**
* Constructor for a device client config that retrieves the authentication method from a security provider instance and sets the keep alive interval
* @param connectionString The connection string for the iot hub to connect with
* @param securityProvider The security provider instance to be used for authentication of this device
* @param clientOptions The client options that will be used to set the keep alive
* @throws IOException if the provided security provider throws an exception while authenticating
*/
ClientConfiguration(IotHubConnectionString connectionString, SecurityProvider securityProvider, IotHubClientProtocol protocol, ClientOptions clientOptions) throws IOException
{
// When setting the ClientOptions and a SecurityProvider, the SecurityProvider is responsible for setting the sslContext
// we do not need to set the context in this constructor.
this(connectionString, securityProvider, protocol);
setClientOptionValues(clientOptions);
}
private void commonConstructorSetup(IotHubConnectionString iotHubConnectionString)
{
if (iotHubConnectionString == null)
{
throw new IllegalArgumentException("connection string cannot be null");
}
this.productInfo = new ProductInfo();
this.useWebsocket = false;
}
private void assertConnectionStringIsNotX509(IotHubConnectionString iotHubConnectionString)
{
if (iotHubConnectionString.isUsingX509())
{
throw new IllegalArgumentException("Cannot use this constructor for x509 connection strings. Use constructor that takes public key certificate and private key or takes an SSLContext instance instead");
}
}
/**
* Getter for SasTokenAuthentication
*
* @return The value of SasTokenAuthentication, or null if this object isn't using sas token authentication
*/
public IotHubSasTokenAuthenticationProvider getSasTokenAuthentication()
{
if (this.authenticationProvider instanceof IotHubSasTokenAuthenticationProvider)
{
return (IotHubSasTokenAuthenticationProvider) this.authenticationProvider;
}
return null;
}
public IotHubAuthenticationProvider getAuthenticationProvider()
{
return this.authenticationProvider;
}
/**
* Getter for Websocket
* @return true if set, false otherwise
*/
public boolean isUsingWebsocket()
{
return this.useWebsocket;
}
/**
* Setter for Websocket
* @param useWebsocket true if to be set, false otherwise
*/
void setUseWebsocket(boolean useWebsocket)
{
this.useWebsocket = useWebsocket;
}
/**
* Setter for the message callback. Can be {@code null}.
* @param callback the message callback. Can be {@code null}.
* @param context the context to be passed in to the callback.
*/
void setMessageCallback(MessageCallback callback, Object context)
{
this.defaultDeviceTelemetryMessageCallback = callback;
this.defaultDeviceTelemetryMessageContext = context;
}
void setMessageCallback(String inputName, MessageCallback callback, Object context)
{
if (this.inputChannelMessageCallbacks.containsKey(inputName) && callback == null)
{
this.inputChannelMessageCallbacks.remove(inputName);
}
else
{
this.inputChannelMessageCallbacks.put(inputName, new Pair<>(callback, context));
}
}
/**
* Getter for the IoT Hub hostname.
* @return the IoT Hub hostname.
*/
public String getIotHubHostname()
{
return this.authenticationProvider.getHostname();
}
/**
* Getter for the IoT Hub name.
* @return the IoT Hub name.
*/
public String getIotHubName()
{
return IotHubConnectionString.parseHubName(this.authenticationProvider.getHostname());
}
/**
* Getter for the Gateway host name.
* @return the name of the gateway host
*/
public String getGatewayHostname()
{
return this.authenticationProvider.getGatewayHostname();
}
/**
* Getter for the device ID.
*
* @return the device ID.
*/
public String getDeviceId()
{
return this.authenticationProvider.getDeviceId();
}
public String getModuleId()
{
return this.authenticationProvider.getModuleId();
}
public String getDeviceClientUniqueIdentifier()
{
// Use device Id if present, use module Id if no device Id is present, use a unique Identifier if neither was set.
String identifierPrefix = getDeviceId();
if (identifierPrefix == null || identifierPrefix.isEmpty())
{
identifierPrefix = getModuleId();
if (identifierPrefix == null || identifierPrefix.isEmpty())
{
// If there is no device Id or module Id, set the identifier prefix to be
identifierPrefix = UUID.randomUUID().toString().substring(0, 8);
}
}
return identifierPrefix + "-" + this.deviceClientUniqueIdentifier;
}
/**
* Getter for the message callback.
*
* @param inputName the inputName that the desired callback is tied to, or null for the default callback
*
* @return the message callback.
*/
public MessageCallback getDeviceTelemetryMessageCallback(String inputName)
{
if (inputName == null || !this.inputChannelMessageCallbacks.containsKey(inputName))
{
return this.defaultDeviceTelemetryMessageCallback;
}
else
{
return this.inputChannelMessageCallbacks.get(inputName).getKey();
}
}
/**
* Getter for the context to be passed in to the message callback.
*
* @param inputName the inputName that the desired callback context is tied to, or null for the default callback context
*
* @return the message context.
*/
public Object getDeviceTelemetryMessageContext(String inputName)
{
if (inputName == null || !this.inputChannelMessageCallbacks.containsKey(inputName))
{
return this.defaultDeviceTelemetryMessageContext;
}
else
{
return this.inputChannelMessageCallbacks.get(inputName).getValue();
}
}
/**
* Setter for the device method message callback.
*
* @param callback Callback for device method messages.
* @param context is the context for the callback.
*/
public void setDirectMethodsMessageCallback(MessageCallback callback, Object context)
{
this.directMethodsMessageCallback = callback;
this.directMethodsMessageContext = context;
}
/**
* Getter for the device twin message callback.
*
* @return the device method message callback.
*/
public MessageCallback getDirectMethodsMessageCallback()
{
return this.directMethodsMessageCallback;
}
/**
* Getter for the context to be passed in to the device twin message callback.
*
* @return the device method message context.
*/
public Object getDirectMethodsMessageContext()
{
return this.directMethodsMessageContext;
}
/**
* Setter for the device twin message callback.
*
* @param callback callback to be invoked for device twin messages.
* @param context is the context for the callback.
*/
public void setDeviceTwinMessageCallback(MessageCallback callback, Object context)
{
this.deviceTwinMessageCallback = callback;
this.deviceTwinMessageContext = context;
}
/**
* Getter for the device twin message callback.
*
* @return the device twin message callback.
*/
public MessageCallback getDeviceTwinMessageCallback()
{
return this.deviceTwinMessageCallback;
}
/**
* Getter for the context to be passed in to the device twin message callback.
*
* @return the device twin message context.
*/
public Object getDeviceTwinMessageContext()
{
return this.deviceTwinMessageContext;
}
/**
* Getter for the timeout, in seconds, for the lock that the client has on a
* received message.
*
* @return the timeout, in seconds, for a received message lock.
*/
public int getMessageLockTimeoutSecs()
{
return DEFAULT_MESSAGE_LOCK_TIMEOUT_SECS;
}
/**
* Getter for AuthenticationType
*
* @return The value of AuthenticationType
*/
public AuthType getAuthenticationType()
{
if (this.authenticationProvider instanceof IotHubSasTokenAuthenticationProvider)
{
return AuthType.SAS_TOKEN;
}
else
{
return AuthType.X509_CERTIFICATE;
}
}
/**
* Sets the device operation timeout
* @param timeout the amount of time, in milliseconds, that a given device operation can last before expiring
* @throws IllegalArgumentException if timeout is 0 or negative
*/
void setOperationTimeout(long timeout) throws IllegalArgumentException
{
if (timeout < 1)
{
throw new IllegalArgumentException("Operation timeout cannot be 0 or negative");
}
this.operationTimeout = timeout;
}
@SuppressWarnings("unused")
protected ClientConfiguration()
{
this.authenticationProvider = null;
this.directMethodsMessageCallback = null;
this.defaultDeviceTelemetryMessageCallback = null;
this.deviceTwinMessageCallback = null;
this.directMethodsMessageContext = null;
this.defaultDeviceTelemetryMessageContext = null;
this.deviceTwinMessageContext = null;
this.useWebsocket = false;
this.protocol = AMQPS;
}
}
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