1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
|
// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "rpcsendv2.h"
#include "rpcnetwork.h"
#include "rpcserviceaddress.h"
#include <vespa/fnet/frt/reflection.h>
#include <vespa/fnet/frt/require_capabilities.h>
#include <vespa/messagebus/emptyreply.h>
#include <vespa/messagebus/error.h>
#include <vespa/vespalib/data/databuffer.h>
#include <vespa/vespalib/data/slime/slime.h>
#include <vespa/vespalib/util/compressor.h>
#include <vespa/vespalib/util/size_literals.h>
#include <vespa/vespalib/util/stringfmt.h>
using vespalib::make_string;
using vespalib::compression::CompressionConfig;
using vespalib::compression::decompress;
using vespalib::compression::compress;
using vespalib::DataBuffer;
using vespalib::ConstBufferRef;
using vespalib::stringref;
using vespalib::Memory;
using vespalib::Slime;
using vespalib::Version;
using namespace vespalib::slime;
namespace mbus {
namespace {
const char *METHOD_NAME = "mbus.slime";
const char *METHOD_PARAMS = "bixbix";
const char *METHOD_RETURN = "bixbix";
Memory VERSION_F("version");
Memory ROUTE_F("route");
Memory SESSION_F("session");
Memory USERETRY_F("useretry");
Memory RETRYDELAY_F("retrydelay");
Memory RETRY_F("retry");
Memory TIMELEFT_F("timeleft");
Memory PROTOCOL_F("prot");
Memory TRACELEVEL_F("tracelevel");
Memory TRACE_F("trace");
Memory BLOB_F("msg");
Memory ERRORS_F("errors");
Memory CODE_F("code");
Memory MSG_F("msg");
Memory SERVICE_F("service");
}
bool
RPCSendV2::isCompatible(stringref method, stringref request, stringref response)
{
return (method == METHOD_NAME) &&
(request == METHOD_PARAMS) &&
(response == METHOD_RETURN);
}
void
RPCSendV2::build(FRT_ReflectionBuilder & builder, CapabilitySet required_capabilities)
{
builder.DefineMethod(METHOD_NAME, METHOD_PARAMS, METHOD_RETURN, FRT_METHOD(RPCSendV2::invoke), this);
builder.MethodDesc("Send a message bus slime request and get a reply back.");
builder.ParamDesc("header_encoding", "0=raw, 6=lz4");
builder.ParamDesc("header_decoded_size", "Uncompressed header blob size");
builder.ParamDesc("header_payload", "The message header blob in slime");
builder.ParamDesc("body_encoding", "0=raw, 6=lz4");
builder.ParamDesc("body_decoded_size", "Uncompressed body blob size");
builder.ParamDesc("body_payload", "The message body blob in slime");
builder.ReturnDesc("header_encoding", "0=raw, 6=lz4");
builder.ReturnDesc("header_decoded_size", "Uncompressed header blob size");
builder.ReturnDesc("header_payload", "The reply header blob in slime.");
builder.ReturnDesc("body_encoding", "0=raw, 6=lz4");
builder.ReturnDesc("body_decoded_size", "Uncompressed body blob size");
builder.ReturnDesc("body_payload", "The reply body blob in slime.");
builder.RequestAccessFilter(FRT_RequireCapabilities::of(required_capabilities));
}
const char *
RPCSendV2::getReturnSpec() const {
return METHOD_RETURN;
}
namespace {
class OutputBuf : public vespalib::Output {
public:
explicit OutputBuf(size_t estimatedSize) : _buf(estimatedSize) { }
~OutputBuf() override;
DataBuffer & getBuf() { return _buf; }
private:
vespalib::WritableMemory reserve(size_t bytes) override {
_buf.ensureFree(bytes);
return {_buf.getFree(), _buf.getFreeLen()};
}
Output &commit(size_t bytes) override {
_buf.moveFreeToData(bytes);
return *this;
}
DataBuffer _buf;
};
OutputBuf::~OutputBuf() = default;
}
void
RPCSendV2::encodeRequest(FRT_RPCRequest &req, const Version &version, const Route & route,
const RPCServiceAddress & address, const Message & msg, uint32_t traceLevel,
const PayLoadFiller &filler, duration timeRemaining) const
{
FRT_Values &args = *req.GetParams();
req.SetMethodName(METHOD_NAME);
// Place holder for auxillary data to be transfered later.
args.AddInt8(CompressionConfig::NONE);
args.AddInt32(0);
args.AddData("", 0);
Slime slime;
Cursor & root = slime.setObject();
root.setString(VERSION_F, version.toString());
root.setString(ROUTE_F, route.toString());
root.setString(SESSION_F, address.getSessionName());
root.setBool(USERETRY_F, msg.getRetryEnabled());
root.setLong(RETRY_F, msg.getRetry());
root.setLong(TIMELEFT_F, vespalib::count_ms(timeRemaining));
root.setString(PROTOCOL_F, msg.getProtocol());
root.setLong(TRACELEVEL_F, traceLevel);
filler.fill(BLOB_F, root);
OutputBuf rBuf(8_Ki);
BinaryFormat::encode(slime, rBuf);
ConstBufferRef toCompress(rBuf.getBuf().getData(), rBuf.getBuf().getDataLen());
DataBuffer buf(vespalib::roundUp2inN(rBuf.getBuf().getDataLen()));
CompressionConfig::Type type = compress(_net->getCompressionConfig(), toCompress, buf, false);
args.AddInt8(type);
args.AddInt32(toCompress.size());
const auto bufferLength = buf.getDataLen();
assert(bufferLength <= INT32_MAX);
args.AddData(std::move(buf).stealBuffer(), bufferLength);
}
namespace {
class ParamsV2 : public RPCSend::Params
{
public:
explicit ParamsV2(const FRT_Values &arg)
: _slime()
{
uint8_t encoding = arg[3]._intval8;
uint32_t uncompressedSize = arg[4]._intval32;
DataBuffer uncompressed(arg[5]._data._buf, arg[5]._data._len);
ConstBufferRef blob(arg[5]._data._buf, arg[5]._data._len);
decompress(CompressionConfig::toType(encoding), uncompressedSize, blob, uncompressed, true);
assert(uncompressedSize == uncompressed.getDataLen());
BinaryFormat::decode(Memory(uncompressed.getData(), uncompressed.getDataLen()), _slime);
}
uint32_t getTraceLevel() const override { return _slime.get()[TRACELEVEL_F].asLong(); }
bool useRetry() const override { return _slime.get()[USERETRY_F].asBool(); }
uint32_t getRetries() const override { return _slime.get()[RETRY_F].asLong(); }
duration getRemainingTime() const override { return std::chrono::milliseconds(_slime.get()[TIMELEFT_F].asLong()); }
Version getVersion() const override {
return Version(_slime.get()[VERSION_F].asString().make_stringref());
}
stringref getRoute() const override {
return _slime.get()[ROUTE_F].asString().make_stringref();
}
stringref getSession() const override {
return _slime.get()[SESSION_F].asString().make_stringref();
}
stringref getProtocol() const override {
return _slime.get()[PROTOCOL_F].asString().make_stringref();
}
BlobRef getPayload() const override {
Memory m = _slime.get()[BLOB_F].asData();
return BlobRef(m.data, m.size);
}
private:
Slime _slime;
};
}
std::unique_ptr<RPCSend::Params>
RPCSendV2::toParams(const FRT_Values &args) const
{
return std::make_unique<ParamsV2>(args);
}
std::unique_ptr<Reply>
RPCSendV2::createReply(const FRT_Values & ret, const string & serviceName,
Error & error, vespalib::Trace & rootTrace) const
{
uint8_t encoding = ret[3]._intval8;
uint32_t uncompressedSize = ret[4]._intval32;
DataBuffer uncompressed(ret[5]._data._buf, ret[5]._data._len);
ConstBufferRef blob(ret[5]._data._buf, ret[5]._data._len);
decompress(CompressionConfig::toType(encoding), uncompressedSize, blob, uncompressed, true);
assert(uncompressedSize == uncompressed.getDataLen());
Slime slime;
BinaryFormat::decode(Memory(uncompressed.getData(), uncompressed.getDataLen()), slime);
Inspector & root = slime.get();
Version version(root[VERSION_F].asString().make_string());
Memory payload = root[BLOB_F].asData();
Reply::UP reply;
if (payload.size > 0) {
reply = decode(root[PROTOCOL_F].asString().make_stringref(), version, BlobRef(payload.data, payload.size), error);
}
if ( ! reply ) {
reply = std::make_unique<EmptyReply>();
}
reply->setRetryDelay(root[RETRYDELAY_F].asDouble());
Inspector & errors = root[ERRORS_F];
for (uint32_t i = 0; i < errors.entries(); ++i) {
Inspector & e = errors[i];
Memory service = e[SERVICE_F].asString();
reply->addError(Error(e[CODE_F].asLong(), e[MSG_F].asString().make_string(),
(service.size > 0) ? service.make_string() : serviceName));
}
Inspector & trace = root[TRACE_F];
if (trace.valid() && (trace.asString().size > 0)) {
rootTrace.addChild(TraceNode::decode(trace.asString().make_string()));
}
return reply;
}
void
RPCSendV2::createResponse(FRT_Values & ret, const string & version, Reply & reply, Blob payload) const
{
// Place holder for auxillary data to be transfered later.
ret.AddInt8(CompressionConfig::NONE);
ret.AddInt32(0);
ret.AddData("", 0);
Slime slime;
Cursor & root = slime.setObject();
root.setString(VERSION_F, version);
root.setDouble(RETRYDELAY_F, reply.getRetryDelay());
root.setString(PROTOCOL_F, reply.getProtocol());
root.setData(BLOB_F, vespalib::Memory(payload.data(), payload.size()));
if (reply.getTrace().getLevel() > 0) {
root.setString(TRACE_F, reply.getTrace().encode());
}
if (reply.getNumErrors() > 0) {
Cursor & array = root.setArray(ERRORS_F);
for (uint32_t i = 0; i < reply.getNumErrors(); ++i) {
Cursor & error = array.addObject();
error.setLong(CODE_F, reply.getError(i).getCode());
error.setString(MSG_F, reply.getError(i).getMessage());
error.setString(SERVICE_F, reply.getError(i).getService());
}
}
OutputBuf rBuf(8_Ki);
BinaryFormat::encode(slime, rBuf);
ConstBufferRef toCompress(rBuf.getBuf().getData(), rBuf.getBuf().getDataLen());
DataBuffer buf(vespalib::roundUp2inN(rBuf.getBuf().getDataLen()));
CompressionConfig::Type type = compress(_net->getCompressionConfig(), toCompress, buf, false);
ret.AddInt8(type);
ret.AddInt32(toCompress.size());
assert(buf.getDataLen() <= INT32_MAX);
ret.AddData(std::move(buf));
}
} // namespace mbus
|
