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/*
*
* Copyright 2015, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <ruby/ruby.h>
#include "rb_grpc_imports.generated.h"
#include "rb_channel.h"
#include <grpc/grpc.h>
#include <grpc/grpc_security.h>
#include <grpc/support/alloc.h>
#include <grpc/support/log.h>
#include <grpc/support/time.h>
#include "rb_grpc.h"
#include "rb_call.h"
#include "rb_channel_args.h"
#include "rb_channel_credentials.h"
#include "rb_completion_queue.h"
#include "rb_server.h"
/* id_channel is the name of the hidden ivar that preserves a reference to the
* channel on a call, so that calls are not GCed before their channel. */
static ID id_channel;
/* id_target is the name of the hidden ivar that preserves a reference to the
* target string used to create the call, preserved so that it does not get
* GCed before the channel */
static ID id_target;
/* id_insecure_channel is used to indicate that a channel is insecure */
static VALUE id_insecure_channel;
/* grpc_rb_cChannel is the ruby class that proxies grpc_channel. */
static VALUE grpc_rb_cChannel = Qnil;
/* Used during the conversion of a hash to channel args during channel setup */
static VALUE grpc_rb_cChannelArgs;
/* grpc_rb_channel wraps a grpc_channel. */
typedef struct grpc_rb_channel {
VALUE credentials;
/* The actual channel */
grpc_channel *wrapped;
grpc_completion_queue *queue;
} grpc_rb_channel;
/* Destroys Channel instances. */
static void grpc_rb_channel_free(void *p) {
grpc_rb_channel *ch = NULL;
if (p == NULL) {
return;
};
ch = (grpc_rb_channel *)p;
if (ch->wrapped != NULL) {
grpc_channel_destroy(ch->wrapped);
grpc_rb_completion_queue_destroy(ch->queue);
}
xfree(p);
}
/* Protects the mark object from GC */
static void grpc_rb_channel_mark(void *p) {
grpc_rb_channel *channel = NULL;
if (p == NULL) {
return;
}
channel = (grpc_rb_channel *)p;
if (channel->credentials != Qnil) {
rb_gc_mark(channel->credentials);
}
}
static rb_data_type_t grpc_channel_data_type = {
"grpc_channel",
{grpc_rb_channel_mark, grpc_rb_channel_free, GRPC_RB_MEMSIZE_UNAVAILABLE,
{NULL, NULL}},
NULL, NULL,
#ifdef RUBY_TYPED_FREE_IMMEDIATELY
RUBY_TYPED_FREE_IMMEDIATELY
#endif
};
/* Allocates grpc_rb_channel instances. */
static VALUE grpc_rb_channel_alloc(VALUE cls) {
grpc_rb_channel *wrapper = ALLOC(grpc_rb_channel);
wrapper->wrapped = NULL;
wrapper->credentials = Qnil;
return TypedData_Wrap_Struct(cls, &grpc_channel_data_type, wrapper);
}
/*
call-seq:
insecure_channel = Channel:new("myhost:8080", {'arg1': 'value1'},
:this_channel_is_insecure)
creds = ...
secure_channel = Channel:new("myhost:443", {'arg1': 'value1'}, creds)
Creates channel instances. */
static VALUE grpc_rb_channel_init(int argc, VALUE *argv, VALUE self) {
VALUE channel_args = Qnil;
VALUE credentials = Qnil;
VALUE target = Qnil;
grpc_rb_channel *wrapper = NULL;
grpc_channel *ch = NULL;
grpc_channel_credentials *creds = NULL;
char *target_chars = NULL;
grpc_channel_args args;
MEMZERO(&args, grpc_channel_args, 1);
/* "3" == 3 mandatory args */
rb_scan_args(argc, argv, "3", &target, &channel_args, &credentials);
TypedData_Get_Struct(self, grpc_rb_channel, &grpc_channel_data_type, wrapper);
target_chars = StringValueCStr(target);
grpc_rb_hash_convert_to_channel_args(channel_args, &args);
if (TYPE(credentials) == T_SYMBOL) {
if (id_insecure_channel != SYM2ID(credentials)) {
rb_raise(rb_eTypeError,
"bad creds symbol, want :this_channel_is_insecure");
return Qnil;
}
ch = grpc_insecure_channel_create(target_chars, &args, NULL);
} else {
wrapper->credentials = credentials;
creds = grpc_rb_get_wrapped_channel_credentials(credentials);
ch = grpc_secure_channel_create(creds, target_chars, &args, NULL);
}
if (args.args != NULL) {
xfree(args.args); /* Allocated by grpc_rb_hash_convert_to_channel_args */
}
if (ch == NULL) {
rb_raise(rb_eRuntimeError, "could not create an rpc channel to target:%s",
target_chars);
return Qnil;
}
rb_ivar_set(self, id_target, target);
wrapper->wrapped = ch;
wrapper->queue = grpc_completion_queue_create(NULL);
return self;
}
/*
call-seq:
insecure_channel = Channel:new("myhost:8080", {'arg1': 'value1'})
creds = ...
secure_channel = Channel:new("myhost:443", {'arg1': 'value1'}, creds)
Creates channel instances. */
static VALUE grpc_rb_channel_get_connectivity_state(int argc, VALUE *argv,
VALUE self) {
VALUE try_to_connect = Qfalse;
grpc_rb_channel *wrapper = NULL;
grpc_channel *ch = NULL;
/* "01" == 0 mandatory args, 1 (try_to_connect) is optional */
rb_scan_args(argc, argv, "01", try_to_connect);
TypedData_Get_Struct(self, grpc_rb_channel, &grpc_channel_data_type, wrapper);
ch = wrapper->wrapped;
if (ch == NULL) {
rb_raise(rb_eRuntimeError, "closed!");
return Qnil;
}
return NUM2LONG(
grpc_channel_check_connectivity_state(ch, (int)try_to_connect));
}
/* Watch for a change in connectivity state.
Once the channel connectivity state is different from the last observed
state, tag will be enqueued on cq with success=1
If deadline expires BEFORE the state is changed, tag will be enqueued on
the completion queue with success=0 */
static VALUE grpc_rb_channel_watch_connectivity_state(VALUE self,
VALUE last_state,
VALUE deadline) {
grpc_rb_channel *wrapper = NULL;
grpc_channel *ch = NULL;
grpc_completion_queue *cq = NULL;
void *tag = wrapper;
grpc_event event;
TypedData_Get_Struct(self, grpc_rb_channel, &grpc_channel_data_type, wrapper);
ch = wrapper->wrapped;
cq = wrapper->queue;
if (ch == NULL) {
rb_raise(rb_eRuntimeError, "closed!");
return Qnil;
}
grpc_channel_watch_connectivity_state(
ch,
(grpc_connectivity_state)NUM2LONG(last_state),
grpc_rb_time_timeval(deadline, /* absolute time */ 0),
cq,
tag);
event = rb_completion_queue_pluck(cq, tag,
gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
if (event.success) {
return Qtrue;
} else {
return Qfalse;
}
}
/* Create a call given a grpc_channel, in order to call method. The request
is not sent until grpc_call_invoke is called. */
static VALUE grpc_rb_channel_create_call(VALUE self, VALUE parent,
VALUE mask, VALUE method,
VALUE host, VALUE deadline) {
VALUE res = Qnil;
grpc_rb_channel *wrapper = NULL;
grpc_call *call = NULL;
grpc_call *parent_call = NULL;
grpc_channel *ch = NULL;
grpc_completion_queue *cq = NULL;
int flags = GRPC_PROPAGATE_DEFAULTS;
char *method_chars = StringValueCStr(method);
char *host_chars = NULL;
if (host != Qnil) {
host_chars = StringValueCStr(host);
}
if (mask != Qnil) {
flags = NUM2UINT(mask);
}
if (parent != Qnil) {
parent_call = grpc_rb_get_wrapped_call(parent);
}
cq = grpc_completion_queue_create(NULL);
TypedData_Get_Struct(self, grpc_rb_channel, &grpc_channel_data_type, wrapper);
ch = wrapper->wrapped;
if (ch == NULL) {
rb_raise(rb_eRuntimeError, "closed!");
return Qnil;
}
call = grpc_channel_create_call(ch, parent_call, flags, cq, method_chars,
host_chars, grpc_rb_time_timeval(
deadline,
/* absolute time */ 0), NULL);
if (call == NULL) {
rb_raise(rb_eRuntimeError, "cannot create call with method %s",
method_chars);
return Qnil;
}
res = grpc_rb_wrap_call(call, cq);
/* Make this channel an instance attribute of the call so that it is not GCed
* before the call. */
rb_ivar_set(res, id_channel, self);
return res;
}
/* Closes the channel, calling it's destroy method */
static VALUE grpc_rb_channel_destroy(VALUE self) {
grpc_rb_channel *wrapper = NULL;
grpc_channel *ch = NULL;
TypedData_Get_Struct(self, grpc_rb_channel, &grpc_channel_data_type, wrapper);
ch = wrapper->wrapped;
if (ch != NULL) {
grpc_channel_destroy(ch);
wrapper->wrapped = NULL;
}
return Qnil;
}
/* Called to obtain the target that this channel accesses. */
static VALUE grpc_rb_channel_get_target(VALUE self) {
grpc_rb_channel *wrapper = NULL;
VALUE res = Qnil;
char* target = NULL;
TypedData_Get_Struct(self, grpc_rb_channel, &grpc_channel_data_type, wrapper);
target = grpc_channel_get_target(wrapper->wrapped);
res = rb_str_new2(target);
gpr_free(target);
return res;
}
static void Init_grpc_propagate_masks() {
/* Constants representing call propagation masks in grpc.h */
VALUE grpc_rb_mPropagateMasks = rb_define_module_under(
grpc_rb_mGrpcCore, "PropagateMasks");
rb_define_const(grpc_rb_mPropagateMasks, "DEADLINE",
UINT2NUM(GRPC_PROPAGATE_DEADLINE));
rb_define_const(grpc_rb_mPropagateMasks, "CENSUS_STATS_CONTEXT",
UINT2NUM(GRPC_PROPAGATE_CENSUS_STATS_CONTEXT));
rb_define_const(grpc_rb_mPropagateMasks, "CENSUS_TRACING_CONTEXT",
UINT2NUM(GRPC_PROPAGATE_CENSUS_TRACING_CONTEXT));
rb_define_const(grpc_rb_mPropagateMasks, "CANCELLATION",
UINT2NUM(GRPC_PROPAGATE_CANCELLATION));
rb_define_const(grpc_rb_mPropagateMasks, "DEFAULTS",
UINT2NUM(GRPC_PROPAGATE_DEFAULTS));
}
static void Init_grpc_connectivity_states() {
/* Constants representing call propagation masks in grpc.h */
VALUE grpc_rb_mConnectivityStates = rb_define_module_under(
grpc_rb_mGrpcCore, "ConnectivityStates");
rb_define_const(grpc_rb_mConnectivityStates, "IDLE",
LONG2NUM(GRPC_CHANNEL_IDLE));
rb_define_const(grpc_rb_mConnectivityStates, "CONNECTING",
LONG2NUM(GRPC_CHANNEL_CONNECTING));
rb_define_const(grpc_rb_mConnectivityStates, "READY",
LONG2NUM(GRPC_CHANNEL_READY));
rb_define_const(grpc_rb_mConnectivityStates, "TRANSIENT_FAILURE",
LONG2NUM(GRPC_CHANNEL_TRANSIENT_FAILURE));
rb_define_const(grpc_rb_mConnectivityStates, "FATAL_FAILURE",
LONG2NUM(GRPC_CHANNEL_SHUTDOWN));
}
void Init_grpc_channel() {
grpc_rb_cChannelArgs = rb_define_class("TmpChannelArgs", rb_cObject);
grpc_rb_cChannel =
rb_define_class_under(grpc_rb_mGrpcCore, "Channel", rb_cObject);
/* Allocates an object managed by the ruby runtime */
rb_define_alloc_func(grpc_rb_cChannel, grpc_rb_channel_alloc);
/* Provides a ruby constructor and support for dup/clone. */
rb_define_method(grpc_rb_cChannel, "initialize", grpc_rb_channel_init, -1);
rb_define_method(grpc_rb_cChannel, "initialize_copy",
grpc_rb_cannot_init_copy, 1);
/* Add ruby analogues of the Channel methods. */
rb_define_method(grpc_rb_cChannel, "connectivity_state",
grpc_rb_channel_get_connectivity_state,
-1);
rb_define_method(grpc_rb_cChannel, "watch_connectivity_state",
grpc_rb_channel_watch_connectivity_state, 4);
rb_define_method(grpc_rb_cChannel, "create_call",
grpc_rb_channel_create_call, 5);
rb_define_method(grpc_rb_cChannel, "target", grpc_rb_channel_get_target, 0);
rb_define_method(grpc_rb_cChannel, "destroy", grpc_rb_channel_destroy, 0);
rb_define_alias(grpc_rb_cChannel, "close", "destroy");
id_channel = rb_intern("__channel");
id_target = rb_intern("__target");
rb_define_const(grpc_rb_cChannel, "SSL_TARGET",
ID2SYM(rb_intern(GRPC_SSL_TARGET_NAME_OVERRIDE_ARG)));
rb_define_const(grpc_rb_cChannel, "ENABLE_CENSUS",
ID2SYM(rb_intern(GRPC_ARG_ENABLE_CENSUS)));
rb_define_const(grpc_rb_cChannel, "MAX_CONCURRENT_STREAMS",
ID2SYM(rb_intern(GRPC_ARG_MAX_CONCURRENT_STREAMS)));
rb_define_const(grpc_rb_cChannel, "MAX_MESSAGE_LENGTH",
ID2SYM(rb_intern(GRPC_ARG_MAX_RECEIVE_MESSAGE_LENGTH)));
id_insecure_channel = rb_intern("this_channel_is_insecure");
Init_grpc_propagate_masks();
Init_grpc_connectivity_states();
}
/* Gets the wrapped channel from the ruby wrapper */
grpc_channel *grpc_rb_get_wrapped_channel(VALUE v) {
grpc_rb_channel *wrapper = NULL;
TypedData_Get_Struct(v, grpc_rb_channel, &grpc_channel_data_type, wrapper);
return wrapper->wrapped;
}
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