我使用 proto 编译器版本 3.4.0 编译了 GNMI proto 文件，我的 proto 文件如下所示： https://github.com/openconfig/gnmi/blob/master/proto/gnmi/gnmi.proto
syntax = "proto3";
import "google/protobuf/any.proto";
import "google/protobuf/descriptor.proto";
// Package gNMI defines a service specification for the gRPC Network Management
// Interface. This interface is defined to be a standard interface via which
// a network management system ("client") can subscribe to state values,
// retrieve snapshots of state information, and manipulate the state of a data
// tree supported by a device ("target").
//
// This document references the gNMI Specification which can be found at
// http://github.com/openconfig/reference/blob/master/rpc/gnmi
package gnmi;
// Define a protobuf FileOption that defines the gNMI service version.
extend google.protobuf.FileOptions {
// The gNMI service semantic version.
string gnmi_service = 1001;
}
// gNMI_service is the current version of the gNMI service, returned through
// the Capabilities RPC.
option (gnmi_service) = "0.5.0";
service gNMI {
// Capabilities allows the client to retrieve the set of capabilities that
// is supported by the target. This allows the target to validate the
// service version that is implemented and retrieve the set of models that
// the target supports. The models can then be specified in subsequent RPCs
// to restrict the set of data that is utilized.
// Reference: gNMI Specification Section 3.2
rpc Capabilities(CapabilityRequest) returns (CapabilityResponse);
// Retrieve a snapshot of data from the target. A Get RPC requests that the
// target snapshots a subset of the data tree as specified by the paths
// included in the message and serializes this to be returned to the
// client using the specified encoding.
// Reference: gNMI Specification Section 3.3
rpc Get(GetRequest) returns (GetResponse);
// Set allows the client to modify the state of data on the target. The
// paths to modified along with the new values that the client wishes
// to set the value to.
// Reference: gNMI Specification Section 3.4
rpc Set(SetRequest) returns (SetResponse);
// Subscribe allows a client to request the target to send it values
// of particular paths within the data tree. These values may be streamed
// at a particular cadence (STREAM), sent one off on a long-lived channel
// (POLL), or sent as a one-off retrieval (ONCE).
// Reference: gNMI Specification Section 3.5
rpc Subscribe(stream SubscribeRequest) returns (stream SubscribeResponse);
}
// Notification is a re-usable message that is used to encode data from the
// target to the client. A Notification carries two types of changes to the data
// tree:
// - Deleted values (delete) - a set of paths that have been removed from the
// data tree.
// - Updated values (update) - a set of path-value pairs indicating the path
// whose value has changed in the data tree.
// Reference: gNMI Specification Section 2.1
message Notification {
int64 timestamp = 1; // Timestamp in nanoseconds since Epoch.
Path prefix = 2; // Prefix used for paths in the message.
// An alias for the path specified in the prefix field.
// Reference: gNMI Specification Section 2.4.2
string alias = 3;
repeated Update update = 4; // Data elements that have changed values.
repeated Path delete = 5; // Data elements that have been deleted.
}
// Update is a re-usable message that is used to store a particular Path,
// Value pair.
// Reference: gNMI Specification Section 2.1
message Update {
Path path = 1; // The path (key) for the update.
Value value = 2 [deprecated=true]; // The value (value) for the update.
TypedValue val = 3; // The explicitly typed update value.
uint32 duplicates = 4; // Number of coalesced duplicates.
}
// TypedValue is used to encode a value being sent between the client and
// target (originated by either entity).
message TypedValue {
// One of the fields within the val oneof is populated with the value
// of the update. The type of the value being included in the Update
// determines which field should be populated. In the case that the
// encoding is a particular form of the base protobuf type, a specific
// field is used to store the value (e.g., json_val).
oneof value {
string string_val = 1; // String value.
int64 int_val = 2; // Integer value.
uint64 uint_val = 3; // Unsigned integer value.
bool bool_val = 4; // Bool value.
bytes bytes_val = 5; // Arbitrary byte sequence value.
float float_val = 6; // Floating point value.
Decimal64 decimal_val = 7; // Decimal64 encoded value.
ScalarArray leaflist_val = 8; // Mixed type scalar array value.
google.protobuf.Any any_val = 9; // protobuf.Any encoded bytes.
bytes json_val = 10; // JSON-encoded text.
bytes json_ietf_val = 11; // JSON-encoded text per RFC7951.
string ascii_val = 12; // Arbitrary ASCII text.
}
}
// Path encodes a data tree path as a series of repeated strings, with
// each element of the path representing a data tree node name and the
// associated attributes.
// Reference: gNMI Specification Section 2.2.2.
message Path {
// Elements of the path are no longer encoded as a string, but rather within
// the elem field as a PathElem message.
repeated string element = 1 [deprecated=true];
string origin = 2; // Label to disambiguate path.
repeated PathElem elem = 3; // Elements of the path.
string target = 4; // The name of the target
// (Sec. 2.2.2.1)
}
// PathElem encodes an element of a gNMI path, along ith any attributes (keys)
// that may be associated with it.
// Reference: gNMI Specification Section 2.2.2.
message PathElem {
string name = 1; // The name of the element in the path.
map<string, string> key = 2; // Map of key (attribute) name to value.
}
// Value encodes a data tree node's value - along with the way in which
// the value is encoded. This message is deprecated by gNMI 0.3.0.
// Reference: gNMI Specification Section 2.2.3.
message Value {
option deprecated = true;
bytes value = 1; // Value of the variable being transmitted.
Encoding type = 2; // Encoding used for the value field.
}
// Encoding defines the value encoding formats that are supported by the gNMI
// protocol. These encodings are used by both the client (when sending Set
// messages to modify the state of the target) and the target when serializing
// data to be returned to the client (in both Subscribe and Get RPCs).
// Reference: gNMI Specification Section 2.3
enum Encoding {
JSON = 0; // JSON encoded text.
BYTES = 1; // Arbitrarily encoded bytes.
PROTO = 2; // Encoded according to out-of-band agreed Protobuf.
ASCII = 3; // ASCII text of an out-of-band agreed format.
JSON_IETF = 4; // JSON encoded text as per RFC7951.
}
// Error message previously utilised to return errors to the client. Deprecated
// in favour of using the google.golang.org/genproto/googleapis/rpc/status
// message in the RPC response.
// Reference: gNMI Specification Section 2.5
message Error {
option deprecated = true;
uint32 code = 1; // Canonical gRPC error code.
string message = 2; // Human readable error.
google.protobuf.Any data = 3; // Optional additional information.
}
// Decimal64 is used to encode a fixed precision decimal number. The value
// is expressed as a set of digits with the precision specifying the
// number of digits following the decimal point in the digit set.
message Decimal64 {
int64 digits = 1; // Set of digits.
uint32 precision = 2; // Number of digits following the decimal point.
}
// ScalarArray is used to encode a mixed-type array of values.
message ScalarArray {
// The set of elements within the array. Each TypedValue message should
// specify only elements that have a field identifier of 1-7 (i.e., the
// values are scalar values).
repeated TypedValue element = 1;
}
// SubscribeRequest is the message sent by the client to the target when
// initiating a subscription to a set of paths within the data tree. The
// request field must be populated and the initial message must specify a
// SubscriptionList to initiate a subscription. The message is subsequently
// used to define aliases or trigger polled data to be sent by the target.
// Reference: gNMI Specification Section 3.5.1.1
message SubscribeRequest {
oneof request {
SubscriptionList subscribe = 1; // Specify the paths within a subscription.
Poll poll = 3; // Trigger a polled update.
AliasList aliases = 4; // Aliases to be created.
}
}
// Poll is sent within a SubscribeRequest to trigger the device to
// send telemetry updates for the paths that are associated with the
// subscription.
// Reference: gNMI Specification Section Section 3.5.1.4
message Poll {
}
// SubscribeResponse is the message used by the target within a Subscribe RPC.
// The target includes a Notification message which is used to transmit values
// of the path(s) that are associated with the subscription. The same message
// is to indicate that the target has sent all data values once (is
// synchronized).
// Reference: gNMI Specification Section 3.5.1.4
message SubscribeResponse {
oneof response {
Notification update = 1; // Changed or sampled value for a path.
// Indicate target has sent all values associated with the subscription
// at least once.
bool sync_response = 3;
// Deprecated in favour of google.golang.org/genproto/googleapis/rpc/status
Error error = 4 [deprecated=true];
}
}
// SubscriptionList is used within a Subscribe message to specify the list of
// paths that the client wishes to subscribe to. The message consists of a
// list of (possibly prefixed) paths, and options that relate to the
// subscription.
// Reference: gNMI Specification Section 3.5.1.2
message SubscriptionList {
Path prefix = 1; // Prefix used for paths.
repeated Subscription subscription = 2; // Set of subscriptions to create.
// Whether target defined aliases are allowed within the subscription.
bool use_aliases = 3;
QOSMarking qos = 4; // DSCP marking to be used.
// Mode of the subscription.
enum Mode {
STREAM = 0; // Values streamed by the target (Sec. 3.5.1.5.2).
ONCE = 1; // Values sent once-off by the target (Sec. 3.5.1.5.1).
POLL = 2; // Values sent in response to a poll request (Sec. 3.5.1.5.3).
}
Mode mode = 5;
// Whether elements of the schema that are marked as eligible for aggregation
// should be aggregated or not.
bool allow_aggregation = 6;
// The set of schemas that define the elements of the data tree that should
// be sent by the target.
repeated ModelData use_models = 7;
// The encoding that the target should use within the Notifications generated
// corresponding to the SubscriptionList.
Encoding encoding = 8;
// An optional field to specify that only updates to current state should be
// sent to a client. If set, the initial state is not sent to the client but
// rather only the sync message followed by any subsequent updates to the
// current state. For ONCE and POLL modes, this causes the server to send only
// the sync message (Sec. 3.5.2.3).
bool updates_only = 9;
}
// Subscription is a single request within a SubscriptionList. The path
// specified is interpreted (along with the prefix) as the elements of the data
// tree that the client is subscribing to. The mode determines how the target
// should trigger updates to be sent.
// Reference: gNMI Specification Section 3.5.1.3
message Subscription {
Path path = 1; // The data tree path.
SubscriptionMode mode = 2; // Subscription mode to be used.
uint64 sample_interval = 3; // ns between samples in SAMPLE mode.
// Indicates whether values that not changed should be sent in a SAMPLE
// subscription.
bool suppress_redundant = 4;
// Specifies the maximum allowable silent period in nanoseconds when
// suppress_redundant is in use. The target should send a value at least once
// in the period specified.
uint64 heartbeat_interval = 5;
}
// SubscriptionMode is the mode of the subscription, specifying how the
// target must return values in a subscription.
// Reference: gNMI Specification Section 3.5.1.3
enum SubscriptionMode {
TARGET_DEFINED = 0; // The target selects the relevant mode for each element.
ON_CHANGE = 1; // The target sends an update on element value change.
SAMPLE = 2; // The target samples values according to the interval.
}
// QOSMarking specifies the DSCP value to be set on transmitted telemetry
// updates from the target.
// Reference: gNMI Specification Section 3.5.1.2
message QOSMarking {
uint32 marking = 1;
}
// Alias specifies a data tree path, and an associated string which defines an
// alias which is to be used for this path in the context of the RPC. The alias
// is specified as a string which is prefixed with "#" to disambiguate it from
// data tree element paths.
// Reference: gNMI Specification Section 2.4.2
message Alias {
Path path = 1; // The path to be aliased.
string alias = 2; // The alias value, a string prefixed by "#".
}
// AliasList specifies a list of aliases. It is used in a SubscribeRequest for
// a client to create a set of aliases that the target is to utilize.
// Reference: gNMI Specification Section 3.5.1.6
message AliasList {
repeated Alias alias = 1; // The set of aliases to be created.
}
// SetRequest is sent from a client to the target to update values in the data
// tree. Paths are either deleted by the client, or modified by means of being
// updated, or replaced. Where a replace is used, unspecified values are
// considered to be replaced, whereas when update is used the changes are
// considered to be incremental. The set of changes that are specified within
// a single SetRequest are considered to be a transaction.
// Reference: gNMI Specification Section 3.4.1
message SetRequest {
Path prefix = 1; // Prefix used for paths in the message.
repeated Path delete = 2; // Paths to be deleted from the data tree.
repeated Update replace = 3; // Updates specifying elements to be replaced.
repeated Update update = 4; // Updates specifying elements to updated.
}
// SetResponse is the response to a SetRequest, sent from the target to the
// client. It reports the result of the modifications to the data tree that were
// specified by the client. Errors for this RPC should be reported using the
// https://github.com/googleapis/googleapis/blob/master/google/rpc/status.proto
// message in the RPC return. The gnmi.Error message can be used to add additional
// details where required.
// Reference: gNMI Specification Section 3.4.2
message SetResponse {
Path prefix = 1; // Prefix used for paths.
// A set of responses specifying the result of the operations specified in
// the SetRequest.
repeated UpdateResult response = 2;
Error message = 3 [deprecated=true]; // The overall status of the transaction.
int64 timestamp = 4; // Timestamp of transaction (ns since epoch).
}
// UpdateResult is used within the SetResponse message to communicate the
// result of an operation specified within a SetRequest message.
// Reference: gNMI Specification Section 3.4.2
message UpdateResult {
// The operation that was associated with the Path specified.
enum Operation {
INVALID = 0;
DELETE = 1; // The result relates to a delete of Path.
REPLACE = 2; // The result relates to a replace of Path.
UPDATE = 3; // The result relates to an update of Path.
}
// Deprecated timestamp for the UpdateResult, this field has been
// replaced by the timestamp within the SetResponse message, since
// all mutations effected by a set should be applied as a single
// transaction.
int64 timestamp = 1 [deprecated=true];
Path path = 2; // Path associated with the update.
Error message = 3 [deprecated=true]; // Status of the update operation.
Operation op = 4; // Update operation type.
}
// GetRequest is sent when a client initiates a Get RPC. It is used to specify
// the set of data elements for which the target should return a snapshot of
// data. The use_models field specifies the set of schema modules that are to
// be used by the target - where use_models is not specified then the target
// must use all schema models that it has.
// Reference: gNMI Specification Section 3.3.1
message GetRequest {
Path prefix = 1; // Prefix used for paths.
repeated Path path = 2; // Paths requested by the client.
// Type of elements within the data tree.
enum DataType {
ALL = 0; // All data elements.
CONFIG = 1; // Config (rw) only elements.
STATE = 2; // State (ro) only elements.
// Data elements marked in the schema as operational. This refers to data
// elements whose value relates to the state of processes or interactions
// running on the device.
OPERATIONAL = 3;
}
DataType type = 3; // The type of data being requested.
Encoding encoding = 5; // Encoding to be used.
repeated ModelData use_models = 6; // The schema models to be used.
}
// GetResponse is used by the target to respond to a GetRequest from a client.
// The set of Notifications corresponds to the data values that are requested
// by the client in the GetRequest.
// Reference: gNMI Specification Section 3.3.2
message GetResponse {
repeated Notification notification = 1; // Data values.
Error error = 2 [deprecated=true]; // Errors that occurred in the Get.
}
// CapabilityRequest is sent by the client in the Capabilities RPC to request
// that the target reports its capabilities.
// Reference: gNMI Specification Section 3.2.1
message CapabilityRequest {
}
// CapabilityResponse is used by the target to report its capabilities to the
// client within the Capabilities RPC.
// Reference: gNMI Specification Section 3.2.2
message CapabilityResponse {
repeated ModelData supported_models = 1; // Supported schema models.
repeated Encoding supported_encodings = 2; // Supported encodings.
string gNMI_version = 3; // Supported gNMI version.
}
// ModelData is used to describe a set of schema modules. It can be used in a
// CapabilityResponse where a target reports the set of modules that it
// supports, and within the SubscribeRequest and GetRequest messages to specify
// the set of models from which data tree elements should be reported.
// Reference: gNMI Specification Section 3.2.3
message ModelData {
string name = 1; // Name of the model.
string organization = 2; // Organization publishing the model.
string version = 3; // Semantic version of the model.
}
我使用生成 GRPC 存根
java plugin protoc-gen-grpc-java-1.8.0-linux-x86_64.exe ( Version 1.8.0)
并确实使用了这里推荐的 pom 文件，如下所示：
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-core</artifactId>
<version>1.9.5</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.google.truth</groupId>
<artifactId>truth</artifactId>
<version>0.28</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>io.grpc</groupId>
<artifactId>grpc-protobuf</artifactId>
<version>1.8.0</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>io.grpc</groupId>
<artifactId>grpc-stub</artifactId>
<version>1.8.0</version>
<scope>test</scope>
</dependency>
现在我正在尝试订阅该服务，如下所示：
import gnmi.gNMIGrpc; //Resolved
import gnmi.gNMIGrpc.gNMIStub;//Resolved
import io.grpc.ManagedChannel;//Resolved
import io.grpc.netty.GrpcSslContexts; //Not Resolved
import io.grpc.netty.NettyChannelBuilder; //Not Resolved
import io.netty.handler.ssl.SslContext;//Not Resolved
ManagedChannel originChannel;
SslContext sslcontext = null;
try {
sslcontext = GrpcSslContexts.forClient().trustManager(caFile).keyManager(clientCertFile, keyFile)
.build();
String host = "hostname";
int port = 50051;
ManagedChannel channel = NettyChannelBuilder.forAddress(host, port).
usePlaintext(true).sslContext(sslcontext).build();
gNMIStub gnmiStub2 = gNMIGrpc.newStub(channel);
} catch (SSLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
想知道我在这里缺少什么。我正在使用客户端和证书连接到服务，但无法解析依赖关系，如上述导入语句所示，即 io.grpc.netty.GrpcSslContexts、io.grpc.netty.NettyChannelBuilder、io.netty.handler.ssl.SslContext
我可以使用任何版本的 libprotoc 3.4.0、3.1.0 或 3.0.0。并且对于 GRPC 存根的 java 插件版本非常灵活，即 protoc-gen-grpc-java-1.8.0-linux-x86_64.exe
关于我需要在我的 POM 文件中定义的 Jar 文件的推荐组合、在这种情况下可与 JDK 7 一起使用的正确版本的 libprotoc 编译器和插件有什么想法吗？