I'm involved with a project to convert our spring-boot codebase from Hystrix to Resilience4J. Some of the conversions have been straightforward but there are some more complicated ones that I'm not sure how to convert.
We have classes that have annotations like this:
#DefaultProperties(groupKey = "HistrixCircuitDefaultGroupKey",
commandProperties = {
#HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds", value = "10000"),
#HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds", value = "5000"),
#HystrixProperty(name = "circuitBreaker.requestVolumeThreshold", value = "20"),
#HystrixProperty(name = "circuitBreaker.errorThresholdPercentage", value = "50") },
threadPoolKey = "client-tp",
threadPoolProperties = {
#HystrixProperty(name = "coreSize", value = "55")
})
Then elsewhere in the class the methods are annotated with things like:
#HystrixCommand(commandKey = "postContact")
Can someone give me advice on how to convert that into the equivalent Resilence4J code?
Related
You know that there is a stream find-all method under JpaRepository:
#QueryHints(value = {
#QueryHint(name = HINT_FETCH_SIZE, value = ""),
#QueryHint(name = HINT_CACHEABLE, value = "false"),
#QueryHint(name = HINT_READONLY, value = "true"),
})
Stream<PaidKeyword> findAllBy();
Can I handle same/similar method for Neo4jRepository?
My purpose is so simple. To fetch all data (~5M) partially and effectively. Otherwise, I got timeout errors...
I have created the IOU in corda applicatiion, the IOU has ID,xml payload in body, partyName. NOW, i want to fetch the state with custome query that is basis on ID. NOTE- i am not using linearID.
Below is my API call- which gives me syntax error on. Can someone please correct me, what is the wrong thing that i am doing.
#GetMapping(value = ["getIous"],produces = [ MediaType.APPLICATION_JSON_VALUE])
private fun getTransactionOne(#RequestParam(value = "payloadId") payloadId: String): ResponseEntity<List<IOUState>> {
val generalCriteria = QueryCriteria.VaultQueryCriteria(Vault.StateStatus.ALL)
val results = builder { IOUState::iouId.equal(payloadId)
val customCriteria = QueryCriteria.VaultCustomQueryCriteria(results)}
val criteria = customCriteria.and(customCriteria)
val res = proxy.vaultQueryBy<IOUState>(criteria)
return ResponseEntity.ok(res)
}
I think the issue is because VaultCustomQueryCriteria is applicable only to StatePersistable objects. So you should use PersistentIOU instead of IOUState. Also, I could see incorrect use of brackets. Here is how your code should look like:
#GetMapping(value = ["getIous"],produces = [ MediaType.APPLICATION_JSON_VALUE])
private fun getTransactionOne(#RequestParam(value = "payloadId") payloadId: String): ResponseEntity<List<IOUState>> {
val generalCriteria = QueryCriteria.VaultQueryCriteria(Vault.StateStatus.ALL)
val results = builder {
val idx = IOUSchemaV1.PersistentIOU::iouId.equal(payloadId);
val customCriteria = QueryCriteria.VaultCustomQueryCriteria(idx)
val criteria = generalCriteria.and(customCriteria)
proxy.vaultQueryBy<IOUState>(criteria);
}
return ResponseEntity.ok(results)
}
I have model:
class Ingredient(models.Model):
KILOGRAM = 'kg'
LITER = 'ltr'
PIECES = 'pcs'
MUNITS_CHOICES = (
(KILOGRAM, 'Kilogram'),
(LITER, 'Liter'),
(PIECES, 'Pieces'),
)
name = models.CharField(max_length=200,unique=True,null=False)
slug = models.SlugField(unique=True)
munit = models.CharField(max_length=10,choices=MUNITS_CHOICES,default=KILOGRAM)
rate = models.DecimalField(max_digits=19, decimal_places=2,validators=[MinValueValidator(0)],default=0)
typeofingredient = models.ForeignKey(TypeOfIngredient, related_name='typeof_ingredient',null=True, blank=True,on_delete=models.PROTECT)
density_kg_per_lt = models.DecimalField(max_digits=19, decimal_places=2,verbose_name='Density (kg/lt)',null=True,blank=True,validators=[MinValueValidator(0)])
density_pcs_per_kg = models.DecimalField(max_digits=19, decimal_places=2,verbose_name='Density (pcs/kg)',null=True,blank=True,validators=[MinValueValidator(0)])
density_pcs_per_lt = models.DecimalField(max_digits=19, decimal_places=2,verbose_name='Density (pcs/lt)',null=True,blank=True,validators=[MinValueValidator(0)])
updated = models.DateTimeField(auto_now=True, auto_now_add=False)
timestamp = models.DateTimeField(auto_now=False, auto_now_add=True)
When i get the api i also want to get field types like char, decimal, datetime etc
Something like the below api result, is it possible. Because i am using reactJs as frontend, i have tell the input what kind of field it can accept and also helps in sorting by text or number
{
"id": {value: 1,type: number},
"name": {value: "adark",type: charfield},
"rate": {value: "12.00",type: decimal},
"updated": {value: "2017-07-14T10:51:47.847171Z",type: datetime},
.......so on
}
The Corresponding Serializer would be as follows:
class IngredientSerializer(serializers.ModelSerializer):
name = serializers.SerializerMethodField()
rate = serializers.SerializerMethodField()
updated = serializers.SerializerMethodField()
class Meta:
model = Ingredient
fields = ('name', 'rate', 'updated')
def get_name(self, obj):
response = dict()
response['value'] = obj.name
response['type'] = obj.name.get_internal_type()
return Response(response)
def get_rate(self, obj):
response = dict()
response['value'] = obj.rate
response['type'] = obj.rate.get_internal_type()
return Response(response)
def get_updated(self, obj):
response = dict()
response['value'] = obj.updated
response['type'] = obj.updated.get_internal_type()
return Response(response)
I am using the following properties for my hystrix implementation
#HystrixCommand(fallbackMethod = "circuitBreakerFallbackForGet",commandProperties = {
#HystrixProperty(name = "execution.isolation.strategy", value = "THREAD"),
#HystrixProperty(name = "execution.timeout.enabled", value = "false"),
#HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds", value = "10000"),
#HystrixProperty(name = "execution.isolation.thread.interruptOnTimeout", value = "false"),
#HystrixProperty(name = "fallback.enabled", value = "true"),
#HystrixProperty(name = "circuitBreaker.enabled", value = "false"),
#HystrixProperty(name = "circuitBreaker.requestVolumeThreshold", value = "100"),
#HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds", value = "10000"),
#HystrixProperty(name = "circuitBreaker.errorThresholdPercentage", value = "50"),
#HystrixProperty(name = "circuitBreaker.forceOpen", value = "false"),
#HystrixProperty(name = "metrics.rollingStats.timeInMilliseconds", value = "20000"),
#HystrixProperty(name = "circuitBreaker.forceClosed", value = "false") }, commandKey = "getAccountInfo", groupKey = "getAccountInfo", threadPoolKey = "thread-pool-core-service", threadPoolProperties = {
#HystrixProperty(name = "coreSize", value = "10") })
After adding this code my microservices generally fails and its goes to the fallback method that i have added . I understand that only three values make sense in that and they are
metrics.rollingStats.timeInMilliseconds -- this will be the time limit for the hystrix for considering the failure calculation.
circuitBreaker.errorThresholdPercentage -- this is the percantage of failures that should happen for fallback to come into picture.
circuitBreaker.requestVolumeThreshold -- this is the number of request volume that should come atleast in the mentioned timeinMilliseconds then only hystrix will come into picture.
Also I'm providing seperate commandkey and groupkey for every method where i have added hystrix.
Please suggest how to manage so that it works as expected.
How do I query objects by attribute (instead of 'Filter Keys') using the Genesys Platform SDK?
Endpoint endpoint = new Endpoint("DEV", "the host", 12020);
endpoint.ServicePrincipalName = "the host/the principle";
_confServerProtocol = new ConfServerProtocol(endpoint);
_confServerProtocol.ClientApplicationType = (int)CfgAppType.CFGSCE;
_confServerProtocol.ClientName = "default";
_confServerProtocol.UserName = "the userid";
_confServerProtocol.Open();
IConfService confService = ConfServiceFactory.CreateConfService(_confServerProtocol);
CfgPersonQuery query = new CfgPersonQuery();
// Need to filter based on an Attribute Value (specifically externalID)
var foo = confService.RetrieveMultipleObjects<CfgPerson>(query);
This worked for me:
CfgXPathBasedQuery query = new CfgXPathBasedQuery(confService, CfgObjectType.CFGPerson, "CfgPerson[#externalID='the value']");
Use below:
Uri uri = new Uri("tcp://Host:Port");
Endpoint endpoint = new Endpoint(Guid.NewGuid().ToString(), uri);
ConfServerProtocol confProtocol = new ConfServerProtocol(endpoint);
confProtocol.ClientApplicationType = (int)CfgAppType.CFGSCE;
confProtocol.ClientName = "default";
confProtocol.UserName = "xxxxxx";
confProtocol.UserPassword = "xxxxxx";
//Channel Open
confProtocol.Open();
IConfService confService = ConfServiceFactory.CreateConfService(confProtocol);
CfgPersonQuery query = new CfgPersonQuery();
query.UserName = "AgentID";
CfgPerson person = confService.RetrieveObjects<CfgPerson>(query);
string ExtID = person.ExternalId;
Note: In this way, Filtering is not possible through ExternalId.