c_bool
v_groupStreamSubscribeGroup(
v_groupStream stream,
v_group group)
{
c_bool inserted;
assert(C_TYPECHECK(stream, v_groupStream));
assert(C_TYPECHECK(group, v_group));
if (v_reader(stream)->qos->durability.kind == v_topicQosRef(group->topic)->durability.kind) {
struct groupMatched data;
/*
* OSPL-1073: Check if the new group matches with the group-expression list. This
* is a collection of partition.topic strings that allows users to connect to specific
* topics rather than connecting to all topics within a partition.
*/
if(stream->expr) {
data.matched = FALSE;
data.group = group;
c_walk(stream->expr, (c_action)isGroupMatched, &data);
}else {
data.matched = TRUE;
}
if(data.matched) {
inserted = v_groupAddStream(group, stream);
if(inserted == TRUE){
c_insert(stream->groups, group);
}
}
}
return TRUE;
}
static c_bool
d_storeMMFKernelWalkGroups(
d_storeMMFKernel _this,
d_nameSpace matchingNameSpace,
c_action action,
c_voidp actionArg)
{
groupWalkArg walkArg;
c_bool result;
if (matchingNameSpace == NULL){
result = c_walk(_this->groups, action, actionArg);
} else {
walkArg.matchingNameSpace = matchingNameSpace;
walkArg.action = action;
walkArg.actionArg = actionArg;
result = c_walk(_this->groups, groupWalkMatchingAction, &walkArg);
}
return result;
}
c_iter
v_cfElementGetChildren(
v_cfElement element)
{
c_iter i = NULL;
assert(C_TYPECHECK(element, v_cfElement));
c_walk(element->children, childsToIterator, &i);
return i;
}
c_iter
v_cfElementGetAttributes(
v_cfElement element)
{
c_iter i = NULL;
assert(C_TYPECHECK(element, v_cfElement));
c_walk(element->attributes, attributesToIterator, &i);
return i;
}
void
v_participantNotify(
v_participant _this,
v_event event,
c_voidp userData)
{
/* This Notify method is part of the observer-observable pattern.
* It is designed to be invoked when _this object as observer receives
* an event from an observable object.
* It must be possible to pass the event to the subclass of itself by
* calling <subclass>Notify(_this, event, userData).
* This implies that _this as observer cannot be locked within any
* Notify method to avoid deadlocks.
* For consistency _this must be locked by v_observerLock(_this) before
* calling this method.
*/
assert(_this != NULL);
assert(C_TYPECHECK(_this,v_participant));
if (event) {
switch (event->kind) {
case V_EVENT_NEW_GROUP:
assert(event->userData);
c_mutexLock(&_this->newGroupListMutex);
c_listInsert(_this->newGroupList,v_group(event->userData));
c_mutexUnlock(&_this->newGroupListMutex);
break;
case V_EVENT_LIVELINESS_ASSERT:
c_lockWrite(&_this->lock);
c_walk(_this->entities, assertLivelinessPublisher, event);
c_lockUnlock(&_this->lock);
break;
case V_EVENT_SERVICESTATE_CHANGED:
case V_EVENT_DATA_AVAILABLE:
case V_EVENT_HISTORY_DELETE:
case V_EVENT_HISTORY_REQUEST:
case V_EVENT_PERSISTENT_SNAPSHOT:
/*Do nothing here.*/
break;
default:
OS_REPORT_1(OS_WARNING,"v_participantNotify",0,
"Notify encountered unknown event kind (%d)",
event->kind);
break;
}
}
}
void
v_participantAssertLiveliness(
v_participant p)
{
C_STRUCT(v_event) event;
assert(p != NULL);
assert(C_TYPECHECK(p,v_participant));
event.kind = V_EVENT_LIVELINESS_ASSERT;
event.source = v_publicHandle(v_public(p));
event.userData = NULL;
/* Walk over all entities and assert liveliness on all writers */
c_lockWrite(&p->lock);
c_walk(p->entities, assertLivelinessPublisher, &event);
c_lockUnlock(&p->lock);
}
v_cfAttribute
v_cfElementAttribute(
v_cfElement element,
const c_char *attributeName)
{
struct getAttributeArg arg;
assert(C_TYPECHECK(element, v_cfElement));
assert(attributeName != NULL);
arg.name = attributeName;
arg.attr = NULL;
c_walk(element->attributes, getAttribute, &arg);
assert(C_TYPECHECK(arg.attr, v_cfAttribute));
return arg.attr;
}
void
v_participantConnectNewGroup (
v_participant _this,
v_event event)
{
v_group g;
c_mutexLock(&_this->newGroupListMutex);
g = c_take(_this->newGroupList);
while (g) {
c_mutexUnlock(&_this->newGroupListMutex);
c_lockWrite(&_this->lock);
c_walk(_this->entities, connectNewGroup, g);
c_lockUnlock(&_this->lock);
c_mutexLock(&_this->newGroupListMutex);
g = c_take(_this->newGroupList);
}
c_mutexUnlock(&_this->newGroupListMutex);
}
void
v_leaseRenew(
v_lease lease,
v_duration leaseDuration)
{
c_iter observers = NULL;
v_leaseManager observer;
if (lease != NULL) {
assert(C_TYPECHECK(lease, v_lease));
v_leaseLock(lease);
lease->expiryTime = c_timeAdd(v_timeGet(), leaseDuration);
lease->duration = leaseDuration;
/* Collect all observers, so they can be notified of the lease change
* Must do a seperate collect as the lease mutex is 'lower' then the
* leaseManager mutex. So to prevent deadlock we can not directly notify
* the lease manager as we walk the collection
*/
if(lease->observers)
{
c_walk(lease->observers, v_leaseCollectObservers, &observers);
}
v_leaseUnlock(lease);
if(observers)
{
observer = v_leaseManager(c_iterTakeFirst(observers));
while (observer != NULL)
{
v_leaseManagerNotify(
observer,
lease,
V_EVENT_LEASE_RENEWED);
c_free(observer);
observer = v_leaseManager(c_iterTakeFirst(observers));
}
c_iterFree(observers);
}
}
}
static c_array
copyReaderGIDsFromPublications(
v_deliveryGuard _this)
{
/* copy system Ids from _this->publications */
C_STRUCT(copySystemIdsArg) arg;
c_long size;
if (_this->publications) {
size = c_count(_this->publications);
} else {
size = 0;
}
if (size > 0) {
arg.readerGID = c_arrayNew(_this->gidType,size);
arg.index = 0;
c_walk(_this->publications, copySystemIds, &arg);
} else {
arg.readerGID = NULL;
}
return arg.readerGID;
}
void
v_groupStreamConnectNewGroups(
v_groupStream stream,
v_group group)
{
struct groupConnected data;
assert(stream != NULL);
assert(C_TYPECHECK(stream,v_groupStream));
v_observerLock(v_observer(stream));
/*
* This means the group is interesting for this
* groupActionStream. Now I have to check if the stream is already
* connected to this group, because we wouldn't want to connect
* multiple times to one single group.
*/
data.connected = FALSE;
data.group = group;
c_walk(stream->groups, (c_action)isGroupConnected, &data);
if(data.connected == FALSE){
/*
* The stream is not connected to the group yet, so connect now.
*/
v_groupStreamSubscribeGroup(stream, group);
}
v_observerUnlock(v_observer(stream));
if(data.connected == FALSE){
v_groupStreamHistoricalData(group, stream);
}
return;
}
v_rnrGroupStatistics
v_rnrStorageStatisticsGroup(
v_rnrStorageStatistics _this,
v_service service,
const c_char* name)
{
v_kernel kernel;
struct checkGroupExistsHelper helper;
assert(_this);
assert(C_TYPECHECK(_this, v_rnrStorageStatistics));
assert(service && name);
helper.name = name;
helper.stats = NULL;
if (c_walk(_this->topics, checkGroupExists, &helper)) {
kernel = v_objectKernel(service);
helper.stats = v_rnrGroupStatisticsNew(kernel, name);
assert(helper.stats);
c_tableInsert(_this->topics, helper.stats);
}
return helper.stats;
}
c_iter
v_cfElementXPath(
v_cfElement element,
const c_char *xpathExpr)
{
c_iter result;
const c_char *posInExpr;
const c_char *slash;
char *attribEnd;
c_ulong length;
struct getChildrenArg arg;
c_long nrToProcess;
v_cfNode node;
assert(C_TYPECHECK(element, v_cfElement));
assert(xpathExpr != NULL);
result = c_iterNew(element);
nrToProcess = 1;
posInExpr = xpathExpr;
slash = strchr(posInExpr, XPATH_SEPERATOR);
while (nrToProcess > 0) {
node = c_iterTakeFirst(result);
nrToProcess--;
if (node->kind == V_CFELEMENT) { /* do not process data elements */
if (slash) {
length = C_ADDRESS(slash) - C_ADDRESS(posInExpr);
} else {
length = strlen(posInExpr);
}
arg.children = c_iterNew(NULL);
arg.tagName = (c_char *)os_malloc(length + 1U);
os_strncpy(arg.tagName, posInExpr, length);
arg.tagName[length] = 0;
/* Look for selection criteria based on attribute value
* Example XPath expression:
* /aaa/bbb[@name='value']/ccc or /aaa/bbb[@name!='value']/ccc */
arg.attribName = strchr(arg.tagName, '[');
if (arg.attribName != NULL) {
*arg.attribName = '\0';
arg.attribName = &(arg.attribName[1]);
assert(*arg.attribName == '@');
arg.attribName = &(arg.attribName[1]);
arg.attribValue = strchr(arg.attribName, '!');
if (arg.attribValue != NULL) {
arg.attribNegate = TRUE;
*arg.attribValue = '\0';
arg.attribValue = &arg.attribValue[1];
assert(*arg.attribValue == '=');
} else {
arg.attribNegate = FALSE;
arg.attribValue = strchr(arg.attribName, '=');
}
assert(arg.attribValue != NULL);
*arg.attribValue = '\0';
arg.attribValue = &arg.attribValue[1];
assert(*arg.attribValue == '\'');
arg.attribValue = &(arg.attribValue[1]);
attribEnd = strchr(arg.attribValue, '\'');
assert(attribEnd != NULL);
*attribEnd = '\0';
assert(attribEnd[1] == ']');
}
c_walk(v_cfElement(node)->children, getChildren, &arg);
os_free(arg.tagName);
if (slash) {
nrToProcess += c_iterLength(arg.children);
}
/* now append */
node = v_cfNode(c_iterTakeFirst(arg.children));
while (node != NULL) {
c_iterAppend(result, node);
node = v_cfNode(c_iterTakeFirst(arg.children));
}
c_iterFree(arg.children);
if (slash) {
posInExpr = (const c_char *)(C_ADDRESS(slash) + 1U);
slash = strchr(posInExpr, XPATH_SEPERATOR);
}
}
}
return result;
}
void
v_leaseRenew(
v_lease lease,
v_duration* leaseDuration /* may be NULL */)
{
c_iter observers = NULL;
v_leaseManager observer;
c_time newExpiryTime;
c_equality cmp;
if (lease != NULL) {
assert(C_TYPECHECK(lease, v_lease));
v_leaseLock(lease);
/* Is a new lease duration provided, if so replace the current lease
* duration with the new one
*/
if(leaseDuration != NULL)
{
lease->duration = *leaseDuration;
} /* else do nothing */
/* Calculate the new expiry time */
newExpiryTime = c_timeAdd(v_timeGet(), lease->duration);
/* Is the new expiryTime earlier then the current expiryTime? */
cmp = c_timeCompare(newExpiryTime, lease->expiryTime);
/* Always replace the current expiry time with the new expiryTime */
lease->expiryTime = newExpiryTime;
/* If the new expiryTime is earlier then the previous expiryTime. Then
* this means the observers must be notified so they can take the
* earlier expiryTime into account
*/
if (cmp == C_LT)
{
/* Collect all observers, so they can be notified of the lease change
* Must do a seperate collect as the lease mutex is 'lower' then the
* leaseManager mutex. So to prevent deadlock we can not directly notify
* the lease manager as we walk the collection
*/
if(lease->observers)
{
c_walk(lease->observers, v_leaseCollectObservers, &observers);
}
v_leaseUnlock(lease);
if(observers)
{
observer = v_leaseManager(c_iterTakeFirst(observers));
while (observer != NULL)
{
v_leaseManagerNotify(
observer,
lease,
V_EVENT_LEASE_RENEWED);
c_free(observer);
observer = v_leaseManager(c_iterTakeFirst(observers));
}
c_iterFree(observers);
}
} else
{
/* No need to notify observers, the new expiryTime is not earlier
* then what it was before.
*/
v_leaseUnlock(lease);
}
}
}
static void
printCollection(
c_collectionType type,
toolActionData actionData)
{
c_long size, i, offset, esize;
c_object o;
c_voidp p;
c_object arrayElement;
c_type subtype;
c_bool isRef;
o = c_iterObject(actionData->stack, 0);
switch (type->kind) {
case C_ARRAY:
case C_SEQUENCE:
/* Walk over all entries */
switch (type->kind) {
case C_ARRAY:
if (type->maxSize == 0) {
size = c_arraySize((c_array)o);
} else {
size = type->maxSize;
}
break;
case C_SEQUENCE:
size = c_arraySize((c_array)o);
break;
default:
size = 0;
assert(FALSE);
break;
}
if (c_typeIsRef(type->subType)) {
esize = sizeof(c_voidp);
isRef = TRUE;
} else {
esize = type->subType->size;
isRef = FALSE;
}
p = o;
offset = 0;
for (i=0; i<size; i++) {
iprintf("Element (%d) Offset (%d)\n",i,offset);
arrayElement = isRef ? *((c_object *)p) : (c_object) p;
if (arrayElement != NULL) {
OBJECT_PUSH(actionData, arrayElement);
if (isRef) {
subtype = c_getType(arrayElement);
printType(subtype, actionData);
} else {
iprintf(" ");
printType(type->subType, actionData);
}
printf("\n");
OBJECT_POP(actionData);
} else {
iprintf(" <0x0>\n");
}
p = C_DISPLACE(p, esize);
offset += esize;
}
break;
case C_STRING:
printf(" \"%s\"",(c_char *)o);
break;
case C_SET:
case C_LIST:
case C_BAG:
case C_DICTIONARY:
case C_QUERY:
{
if (o != NULL) {
/* Walk over the elements */
c_walk(o, (c_action)printCollectionAction, actionData);
if (c_count(o) == 0) {
iprintf("<EMPTY>");
}
} else {
iprintf("<NULL>");
}
}
break;
case C_SCOPE:
c_scopeWalk(o, printCollectionAction, actionData);
break;
default:
printf("Specified type <0x"PA_ADDRFMT"> is not a valid collection type\n",
(os_address)type);
break;
}
}
void
v_groupStreamNotify(
v_groupStream stream,
v_event e,
c_voidp userData)
{
struct groupConnected data;
c_iter partitions;
c_bool interested;
v_partition partition, found;
OS_UNUSED_ARG(userData);
assert(stream != NULL);
assert(C_TYPECHECK(stream,v_groupStream));
if (e) {
if (e->kind == V_EVENT_NEW_GROUP) {
v_observerLock(v_observer(stream));
/*
* Check if group fits interest. This extra steps are needed because
* the groupActionStream does not create the groups that match the
* subscriber qos partition expression on creation. It only needs to
* connect to new groups once they are created. This is a different
* approach then for a data reader.
*/
partition = v_group(e->userData)->partition;
/*
* Because already existing partitions are created and added to the
* subscriber of the groupActionStream at creation time, these
* partitions can be resolved from the subscriber. This is necessary to
* determine whether the groupActionStream should connect to the new
* group or if it is already connected.
*/
partitions = v_subscriberLookupPartitions(v_reader(stream)->subscriber,
v_partitionName(partition));
interested = FALSE;
found = v_partition(c_iterTakeFirst(partitions));
while(found){
if(interested == FALSE){
if(strcmp(v_partitionName(partition),
v_partitionName(found)) == 0){
interested = TRUE;
}
}
c_free(found);
found = v_partition(c_iterTakeFirst(partitions));
}
c_iterFree(partitions);
if(interested == TRUE){
/*
* This means the group is interesting for this
* groupActionStream. Now I have to check if the stream is already
* connected to this group, because we wouldn't want to connect
* multiple times to one single group.
*/
data.connected = FALSE;
data.group = v_group(e->userData);
c_walk(stream->groups, (c_action)isGroupConnected, &data);
if(data.connected == FALSE){
/*
* The stream is not connected to the group yet, so connect now.
*/
v_groupStreamSubscribeGroup(stream, v_group(e->userData));
}
}
v_observerUnlock(v_observer(stream));
}
}
return;
}
