The 5-dubbo maturity of the first Knowledge Dubbo series

Maturity of functional maturity

Feature features	Maturity Maturity Level	Strength Strength	Problem Problems	Advise recommendations	User Users
concurrency control	Tested	concurrency control		Trial
Connection control	Tested	Connection Count Control		Trial
Direct Connect Provider	Tested	Point-to-point direct-connect service provider for testing		Test environment use	Alibaba
grouping aggregations	Tested	Grouped aggregate return values for services such as menu aggregation	Special scenes use	Can be used in production environments
Parameter Validation	Tested	Parameter validation, JSR303 validation Framework Integration	has an impact on performance	Trial	Laiwang
Result Cache	Tested	Result cache, for accelerating requests		Trial
Generalization reference	Stable	Generalization calls, without the need for a business interface class for remote calls, for test platforms, open network Guan, etc.		Can be used in production environments	Alibaba
Generalization implementation	Stable	Generalization implementation without the need for a business interface class to implement arbitrary interfaces for mock platforms		Can be used in production environments	Alibaba
echo Test	Tested	echo Test		Trial
Implicit pass-through parameters	Stable	Additional parameters		Can be used in production environments
asynchronous invocation	Tested	Unreliable asynchronous invocation		Trial
Local call	Tested	Local call		Trial
Parameter callback	Tested	Parameter callback	Special scenes use	Trial	Registry
Event notification	Tested	Event notification, triggered before and after a remote call executes		Trial
Local stub	Stable	Perform partial logic on the client		Can be used in production environments	Alibaba
Local camouflage	Stable	Forge return results that can be executed on failure or executed directly for service demotion	Registration Center support required	Can be used in production environments	Alibaba
Delayed exposure	Stable	Delayed exposure service to wait for the app to load warmup data, or wait for the spring load to complete		Can be used in production environments	Alibaba
Delay connection	Tested	Delay establishing a connection, calling when establishing		Trial	Registry
Sticky connections	Tested	A sticky connection that always initiates a request to the same provider, unless the provider hangs, and then switches to another		Trial	Registry
Token validation	Tested	Token authentication, for service authorization	Registration Center support required	Trial
Routing rules	Tested	Dynamically determining call Relationships	Registration Center support required	Trial
Configuration rules	Tested	Dynamic distribution configuration, switch for function	Registration Center support required	Trial
Access log	Tested	Access logs for logging of call information	Local storage, impacting performance, limited by disk size	Trial
Distributed transactions	The	Jta/xa three-phase commit transaction	Not stable	Not available

Policy Maturity Level

Feature features	Maturity Maturity Level	Strength Strength	Problem Problems	Advise recommendations	User Users
Zookeeper Registration Center	Stable	Support network-based clustering, there are a wide range of open-source products, we recommend the use of dubbo-2.3.3 or above version (recommended)	Dependent on the stability of the zookeeper	Can be used in production environments
Redis Registration Center	Stable	Supports a client-based, dual-write clustering approach with high performance	Requires server time synchronization to check for heartbeat stale dirty data	Can be used in production environments
Multicast Registration Center	Tested	De-centralized, no need to install registration center	relies on network tuopu and routing, and is at risk across engine rooms	Small-scale application or development test environment
Simple Registration Center	Tested	Dogfooding, the registry itself is also a standard RPC service	No cluster support, possibly single point of failure	Trial
Feature	Maturity	Strength	problem	Advise	User
Simple Monitoring Center	Stable	Support Jfreechart Statistics Report	No cluster support, possibly single point of failure, but does not affect RPC operation after a failure	Can be used in production environments
Feature	Maturity	Strength	problem	Advise	User
Dubbo Protocol	Stable	A single long connection with NiO multiplexing, and the use of thread pools to process requests concurrently, reducing handshakes and increasing concurrency, performance is better (recommended)	Single connection becomes a bottleneck in large file transfers	Can be used in production environments	Alibaba
RMI Protocol	Stable	Interoperable with native RMI, based on TCP protocol	Occasionally the connection fails and the stub needs to be rebuilt	Can be used in production environments	Alibaba
Hessian protocol	Stable	Interoperable with native Hessian, based on HTTP protocol	Requires Hessian.jar support, the overhead of HTTP short connection	Can be used in production environments
Feature	Maturity	Strength	problem	Advise	User
Netty Transporter	Stable	JBoss NIO Framework with better performance (recommended)	One request to dispatch two kinds of events, to block unwanted events	Can be used in production environments	Alibaba
Mina Transporter	Stable	Established NIO framework, stable	To send a message queue out of time, under great pressure, there will be FULLGC	Can be used in production environments	Alibaba
Grizzly Transporter	Tested	Sun's NIO framework, applied to the GlassFish server	The thread pool is not extensible and filter cannot intercept the next filter	Trial
Feature	Maturity	Strength	problem	Advise	User
Hessian serialization	Stable	Good performance, multi-lingual support (recommended)	Hessian version compatibility is not good, and the application may use the Hessian conflict, Dubbo embedded hessian3.2.1 source code	Can be used in production environments	Alibaba
Dubbo serialization	Tested	By not transmitting the pojo of the class meta information, in a large number of Pojo transmission, performance is better	External file declaration is required when the Parameter object increments the field	Trial
Json serialization	Tested	Plain text, can be resolved across languages, by default with Fastjson parsing	Poor performance	Trial
Java serialization	Stable	Java Native support	Poor performance	Can be used in production environments
Feature	Maturity	Strength	problem	Advise	User
Javassist proxyfactory	Stable	Better performance (recommended) with byte code generation instead of reflection	Depending on the Javassist.jar package, which consumes the JVM's perm memory, Perm may have to be larger: java-xx:permsize=128m	Can be used in production environments	Alibaba
JDK proxyfactory	Stable	JDK native support	Poor performance	Can be used in production environments
Feature	Maturity	Strength	problem	Advise	User
Failover Cluster	Stable	Failed automatic switchover, when a failure occurs, retry other servers, usually for read operations (recommended)	Retry brings a longer delay	Can be used in production environments	Alibaba
Failfast Cluster	Stable	Fast failure, only one call, failure immediate error, usually for non-idempotent write operations	Call failure may occur if a machine is rebooting	Can be used in production environments	Alibaba
Failsafe Cluster	Stable	Fail-safe, directly ignored when an exception occurs, usually for operations such as writing audit logs	Loss of Call information	Can be used in production environments	Monitor
Failback Cluster	Tested	Failed auto-recovery, background logging failed requests, timed re-sending, usually for message notification operations	Unreliable, restart lost	Can be used in production environments	Registry
Forking Cluster	Tested	Multiple servers are called in parallel, as long as a success is returned, typically for high-real-time read operations that require higher	Need to waste more service resources	Can be used in production environments
Broadcast Cluster	Tested	Broadcast call all providers, call each one, an error error, usually used to update the provider local state	Speed is slow, any one error is error	Can be used in production environments
Feature	Maturity	Strength	problem	Advise	User
Random LoadBalance	Stable	Random, set random probability by weight (recommended)	High probability of collisions on a cross section, and transient pressure may occur when retrying	Can be used in production environments	Alibaba
Roundrobin LoadBalance	Stable	Round robin, set round-robin ratio by weight after convention	There is a slow machine build-up request problem, and extreme conditions can create avalanches	Can be used in production environments
Leastactive LoadBalance	Stable	Minimum number of active calls, random of the same active number, active number means the count difference before and after the call, so that slow machines receive fewer requests	Weight is not supported, in capacity planning, can not be weighted to the pressure of a machine pressure measurement capacity	Can be used in production environments
Consistenthash LoadBalance	Stable	Consistent hash, the same parameter requests are always sent to the same provider, when a provider hangs, the original request to the provider, based on the virtual node, divided into other providers, will not cause drastic changes	Uneven pressure sharing	Can be used in production environments
Feature	Maturity	Strength	problem	Advise	User
Conditional Routing Rules	Stable	Conditional expression-based routing rules for easy and easy-to-use functions	Some complex multi-branch conditions, the rules are difficult to describe	Can be used in production environments	Alibaba
Script Routing Rules	Tested	Scripting engine-based routing rules with powerful features	Without running the sandbox, scripting is too powerful to be a backdoor	Trial
Feature	Maturity	Strength	problem	Advise	User
Spring Container	Stable	Automatically load all spring configurations under the Meta-inf/spring directory		Can be used in production environments	Alibaba
Jetty Container	Stable	Launches an inline jetty for reporting status	When a large number of pages are accessed, the server's threads and memory are affected	Can be used in production environments	Alibaba
log4j Container	Stable	Automatic configuration of the log4j, automatically to log files by process when multi-process startup	User cannot control the configuration of log4j, not flexible	Can be used in production environments	Alibaba

The 5-dubbo maturity of the first Knowledge Dubbo series