diff --git a/.github/ISSUE_TEMPLATE/bug_report.md b/.github/ISSUE_TEMPLATE/bug_report.md
new file mode 100644
index 0000000..dd84ea7
--- /dev/null
+++ b/.github/ISSUE_TEMPLATE/bug_report.md
@@ -0,0 +1,38 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Steps to reproduce the behavior:
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**Desktop (please complete the following information):**
+ - OS: [e.g. iOS]
+ - Browser [e.g. chrome, safari]
+ - Version [e.g. 22]
+
+**Smartphone (please complete the following information):**
+ - Device: [e.g. iPhone6]
+ - OS: [e.g. iOS8.1]
+ - Browser [e.g. stock browser, safari]
+ - Version [e.g. 22]
+
+**Additional context**
+Add any other context about the problem here.
diff --git a/.github/ISSUE_TEMPLATE/feature_request.md b/.github/ISSUE_TEMPLATE/feature_request.md
new file mode 100644
index 0000000..bbcbbe7
--- /dev/null
+++ b/.github/ISSUE_TEMPLATE/feature_request.md
@@ -0,0 +1,20 @@
+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.
diff --git a/.github/PULL_REQUEST_TEMPLATE.md b/.github/PULL_REQUEST_TEMPLATE.md
new file mode 100644
index 0000000..143dac8
--- /dev/null
+++ b/.github/PULL_REQUEST_TEMPLATE.md
@@ -0,0 +1,20 @@
+## What is the purpose of the change
+
+XXXXX
+
+## Brief changelog
+
+XX
+
+## Verifying this change
+
+XXXX
+
+Follow this checklist to help us incorporate your contribution quickly and easily. Notice, `it would be helpful if you could finish the following 5 checklist(the last one is not necessary)before request the community to review your PR`.
+
+- [x] Make sure there is a [Github issue](https://github.com/apache/rocketmq/issues) filed for the change (usually before you start working on it). Trivial changes like typos do not require a Github issue. Your pull request should address just this issue, without pulling in other changes - one PR resolves one issue. 
+- [x] Format the pull request title like `[ISSUE #123] Fix UnknownException when host config not exist`. Each commit in the pull request should have a meaningful subject line and body.
+- [x] Write a pull request description that is detailed enough to understand what the pull request does, how, and why.
+- [x] Write necessary unit-test(over 80% coverage) to verify your logic correction, more mock a little better when cross module dependency exist. If the new feature or significant change is committed, please remember to add integration-test in [test module](https://github.com/apache/rocketmq/tree/master/test).
+- [x] Run `mvn -B clean apache-rat:check findbugs:findbugs checkstyle:checkstyle` to make sure basic checks pass. Run `mvn clean install -DskipITs` to make sure unit-test pass. Run `mvn clean test-compile failsafe:integration-test`  to make sure integration-test pass.
+- [ ] If this contribution is large, please file an [Apache Individual Contributor License Agreement](http://www.apache.org/licenses/#clas).
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
new file mode 100644
index 0000000..952ad73
--- /dev/null
+++ b/CONTRIBUTING.md
@@ -0,0 +1,31 @@
+## How To Contribute
+
+We are always very happy to have contributions, whether for trivial cleanups or big new features.
+We want to have high quality, well documented codes for each programming language, as well as the surrounding [ecosystem](https://github.com/apache/rocketmq-externals) of integration tools that people use with RocketMQ.
+
+Nor is code the only way to contribute to the project. We strongly value documentation, integration with other project, and gladly accept improvements for these aspects.
+
+## Contributing code
+
+To submit a change for inclusion, please do the following:
+
+#### If the change is non-trivial please include some unit tests that cover the new functionality.
+#### If you are introducing a completely new feature or API it is a good idea to start a [RIP](https://github.com/apache/rocketmq/wiki/RocketMQ-Improvement-Proposal) and get consensus on the basic design first.
+#### It is our job to follow up on patches in a timely fashion. Nag us if we aren't doing our job (sometimes we drop things).
+
+## Becoming a Committer
+
+We are always interested in adding new contributors. What we look for are series of contributions, good taste and ongoing interest in the project. If you are interested in becoming a committer, please let one of the existing committers know and they can help you walk through the process.
+
+Nowadays,we have several important contribution points:
+#### Wiki & JavaDoc
+#### RocketMQ SDK(C++\.Net\Php\Python\Go\Node.js)
+#### RocketMQ Connectors
+
+##### Prerequisite
+If you want to contribute the above listing points, you must abide our some prerequisites:
+
+###### Readability - API must have Javadoc,some very important methods also must have javadoc
+###### Testability - 80% above unit test coverage about main process
+###### Maintainability - Comply with our [checkstyle spec](style/rmq_checkstyle.xml), and at least 3 month update frequency
+###### Deployability - We encourage you to deploy into [maven repository](http://search.maven.org/)
diff --git a/README.md b/README.md
index f97a09b..df34c82 100644
--- a/README.md
+++ b/README.md
@@ -1,215 +1,215 @@
-RocketMQ_exporter
-==============
-
-RocketMQ exporter for Prometheus.
-
-Table of Contents
------------------
--	[Compatibility](#compatibility)
--   [Dependency](#dependency)
--   [Download](#download)
--   [Compile](#compile)
-	-   [Build Binary](#build-binary)
-	-   [Build Docker Image](#build-docker-image)
--   [Run](#run)
-	-   [Run Binary](#run-binary)
-	-   [Run Docker Image](#run-docker-image)
--   [Flags](#flags)
--   [Metrics](#metrics)
-	-   [Brokers](#brokers)
-	-   [Topics](#topics)
-	-   [Consumer Groups](#consumer-groups)
--   [Grafana Dashboard](#Grafana-Dashboard)
--   [Use Example](#Use-Example)
-
-Compatibility
--------------
-
-Support [Apache RocketMQ](https://rocketmq.apache.org) version 4.3.2 (and later).
-
-Dependency
-----------
-
--	[Prometheus](https://prometheus.io)
-
-Compile
--------
-
-### Build Binary
-
-```shell
-mvn clean install
-```
-
-### Build Docker Image
-
-```shell
-mvn package -Dmaven.test.skip=true docker:build
-```
-
-Run
----
-
-### Run Binary
-
-```shell
-java -jar rocketmq-exporter-0.0.1-SNAPSHOT.jar [--rocketmq.config.namesrvAddr="127.0.0.1:9876" ...]
-```
-
-### Run Docker Image
-
-```
-docker container run -itd --rm  -p 5557:5557  breezecoolyang/rocketmq-exporter [--rocketmq.config.namesrvAddr="127.0.0.1:9876" ...]
-```
-
-Flags
----
-
-This image is configurable using different flags
-
-|Flag name                           | Default            | Description                                        |
-| -----------------------------------|--------------------|----------------------------------------------------|
-| `rocketmq.config.namesrvAddr`      |  127.0.0.1:9876 |name server address  for  broker cluster            |
-| `rocketmq.config.webTelemetryPath` | /metrics           |Path under which to expose metrics                  |
-| `server.port`                      | 5557               |Address to listen on for web interface and telemetry|
-| `rocketmq.config.rocketmqVersion`  | V4_3_2             |rocketmq broker version                             |
-
-Metrics
--------
-
-Documents about exposed Prometheus metrics.
-
-### Broker 
-
-**Metrics details**
-
-| Name         | Exposed information                                  |
-| ------------ | ---------------------------------------------------- |
-| `rocketmq_broker_tps` | Broker produces the number of messages per second |
-| `rocketmq_broker_qps` | Broker consumes messages per second |
-
-**Metrics output example**
-
-```txt
-# HELP rocketmq_broker_tps BrokerPutNums
-# TYPE rocketmq_broker_tps gauge
-rocketmq_broker_tps{cluster="MQCluster",broker="broker-a",} 7.0
-rocketmq_broker_tps{cluster="MQCluster",broker="broker-b",} 7.0
-# HELP rocketmq_broker_qps BrokerGetNums
-# TYPE rocketmq_broker_qps gauge
-rocketmq_broker_qps{cluster="MQCluster",broker="broker-a",} 8.0
-rocketmq_broker_qps{cluster="MQCluster",broker="broker-b",} 8.0
-```
-
-### Topics
-
-**Metrics details**
-
-| Name                | Exposed information                                |
-| ------------------- | -------------------------------------------------- |
-| `rocketmq_producer_tps`      | The number of messages produced per second per topic |
-| `rocketmq_producer_message_size` | The size of a message produced per second by a topic (in bytes) |
-| `rocketmq_producer_offset`   | The progress of a topic's production message |
-
-**Metrics output example**
-
-```txt
-# HELP rocketmq_producer_tps TopicPutNums
-# TYPE rocketmq_producer_tps gauge
-rocketmq_producer_tps{cluster="MQCluster",broker="broker-a",topic="DEV_TID_topic_tfq",} 7.0
-rocketmq_producer_tps{cluster="MQCluster",broker="broker-b",topic="DEV_TID_topic_tfq",} 7.0
-# HELP rocketmq_producer_message_size TopicPutMessageSize
-# TYPE rocketmq_producer_message_size gauge
-rocketmq_producer_message_size{cluster="MQCluster",broker="broker-a",topic="DEV_TID_topic_tfq",} 1642.0
-rocketmq_producer_message_size{cluster="MQCluster",broker="broker-b",topic="DEV_TID_topic_tfq",} 1638.0
-# HELP rocketmq_producer_offset TopicOffset
-# TYPE rocketmq_producer_offset counter
-rocketmq_producer_offset{cluster="MQCluster",broker="broker-a",topic="TBW102",} 0.0
-rocketmq_producer_offset{cluster="MQCluster",broker="broker-b",topic="DEV_TID_tfq",} 1878633.0
-rocketmq_producer_offset{cluster="MQCluster",broker="broker-a",topic="DEV_TID_tfq",} 3843787.0
-rocketmq_producer_offset{cluster="MQCluster",broker="broker-b",topic="DEV_TID_20190304",} 0.0
-rocketmq_producer_offset{cluster="MQCluster",broker="broker-a",topic="BenchmarkTest",} 0.0
-rocketmq_producer_offset{cluster="MQCluster",broker="broker-b",topic="DEV_TID_20190305",} 0.0
-rocketmq_producer_offset{cluster="MQCluster",broker="broker-b",topic="MQCluster",} 0.0
-rocketmq_producer_offset{cluster="MQCluster",broker="broker-a",topic="DEV_TID_topic_tfq",} 2798195.0
-rocketmq_producer_offset{cluster="MQCluster",broker="broker-b",topic="BenchmarkTest",} 0.0
-rocketmq_producer_offset{cluster="MQCluster",broker="broker-b",topic="DEV_TID_topic_tfq",} 1459666.0
-rocketmq_producer_offset{cluster="MQCluster",broker="broker-a",topic="MQCluster",} 0.0
-rocketmq_producer_offset{cluster="MQCluster",broker="broker-a",topic="SELF_TEST_TOPIC",} 0.0
-rocketmq_producer_offset{cluster="MQCluster",broker="broker-a",topic="OFFSET_MOVED_EVENT",} 0.0
-rocketmq_producer_offset{cluster="MQCluster",broker="broker-b",topic="broker-b",} 0.0
-rocketmq_producer_offset{cluster="MQCluster",broker="broker-a",topic="broker-a",} 0.0
-rocketmq_producer_offset{cluster="MQCluster",broker="broker-b",topic="SELF_TEST_TOPIC",} 0.0
-rocketmq_producer_offset{cluster="MQCluster",broker="broker-b",topic="RMQ_SYS_TRANS_HALF_TOPIC",} 0.0
-rocketmq_producer_offset{cluster="MQCluster",broker="broker-a",topic="DEV_TID_20190305",} 0.0
-rocketmq_producer_offset{cluster="MQCluster",broker="broker-b",topic="OFFSET_MOVED_EVENT",} 0.0
-rocketmq_producer_offset{cluster="MQCluster",broker="broker-a",topic="RMQ_SYS_TRANS_HALF_TOPIC",} 0.0
-rocketmq_producer_offset{cluster="MQCluster",broker="broker-b",topic="TBW102",} 0.0
-rocketmq_producer_offset{cluster="MQCluster",broker="broker-a",topic="DEV_TID_20190304",} 0.0
-
-```
-
-### Consumer Groups
-
-**Metrics details**
-
-| Name                                                         | Exposed information                                          |
-| ------------------------------------------------------------ | ------------------------------------------------------------ |
-| `rocketmq_consumer_tps`                                      | The number of messages consumed per second by a consumer group |
-| `rocketmq_consumer_message_size`                             | The size of the message consumed by the consumer group per second (in bytes) |
-| `rocketmq_consumer_offset`                                   | Progress of consumption message for a consumer group         |
-| `rocketmq_group_get_latency`                                 | Consumer latency on some topic for one queue                 |
-| `rocketmq_group_get_latency_by_storetime `                   | Consumption delay time of a consumer group                   |
-| 消息堆积量（需要通过proSQL聚合）（rocketmq_producer_offset-rocketmq_consumer_offset） | Message accumulation (sum(rocketmq_producer_offset) by (topic) - on(topic)  group_right  sum(rocketmq_consumer_offset) by (group,topic)) |
-
-**Metrics output example**
-
-```txt
-# HELP rocketmq_consumer_tps GroupGetNums
-# TYPE rocketmq_consumer_tps gauge
-rocketmq_consumer_tps{cluster="MQCluster",broker="broker-b",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",} 7.0
-rocketmq_consumer_tps{cluster="MQCluster",broker="broker-a",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",} 7.0
-# HELP rocketmq_consumer_message_size GroupGetMessageSize
-# TYPE rocketmq_consumer_message_size gauge
-rocketmq_consumer_message_size{cluster="MQCluster",broker="broker-b",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",} 1638.0
-rocketmq_consumer_message_size{cluster="MQCluster",broker="broker-a",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",} 1642.0
-# HELP rocketmq_consumer_offset GroupOffset
-# TYPE rocketmq_consumer_offset counter
-rocketmq_consumer_offset{cluster="MQCluster",broker="broker-b",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",} 1462030.0
-rocketmq_consumer_offset{cluster="MQCluster",broker="broker-a",topic="DEV_TID_tfq",group="DEV_CID_cfq",} 3843787.0
-rocketmq_consumer_offset{cluster="MQCluster",broker="broker-a",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",} 2800569.0
-rocketmq_consumer_offset{cluster="MQCluster",broker="broker-b",topic="DEV_TID_tfq",group="DEV_CID_cfq",} 1878633.0
-# HELP rocketmq_group_get_latency GroupGetLatency
-# TYPE rocketmq_group_get_latency gauge
-rocketmq_group_get_latency{cluster="MQCluster",broker="broker-b",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",queueid="0",} 0.05
-rocketmq_group_get_latency{cluster="MQCluster",broker="broker-b",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",queueid="1",} 0.0
-rocketmq_group_get_latency{cluster="MQCluster",broker="broker-a",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",queueid="7",} 0.05
-rocketmq_group_get_latency{cluster="MQCluster",broker="broker-b",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",queueid="6",} 0.01
-rocketmq_group_get_latency{cluster="MQCluster",broker="broker-a",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",queueid="3",} 0.0
-rocketmq_group_get_latency{cluster="MQCluster",broker="broker-b",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",queueid="7",} 0.03
-rocketmq_group_get_latency{cluster="MQCluster",broker="broker-a",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",queueid="4",} 0.0
-rocketmq_group_get_latency{cluster="MQCluster",broker="broker-a",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",queueid="5",} 0.03
-rocketmq_group_get_latency{cluster="MQCluster",broker="broker-a",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",queueid="6",} 0.01
-rocketmq_group_get_latency{cluster="MQCluster",broker="broker-b",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",queueid="2",} 0.0
-rocketmq_group_get_latency{cluster="MQCluster",broker="broker-b",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",queueid="3",} 0.0
-rocketmq_group_get_latency{cluster="MQCluster",broker="broker-a",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",queueid="0",} 0.0
-rocketmq_group_get_latency{cluster="MQCluster",broker="broker-b",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",queueid="4",} 0.0
-rocketmq_group_get_latency{cluster="MQCluster",broker="broker-a",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",queueid="1",} 0.03
-rocketmq_group_get_latency{cluster="MQCluster",broker="broker-b",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",queueid="5",} 0.0
-rocketmq_group_get_latency{cluster="MQCluster",broker="broker-a",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",queueid="2",} 0.0
-# HELP rocketmq_group_get_latency_by_storetime GroupGetLatencyByStoreTime
-# TYPE rocketmq_group_get_latency_by_storetime gauge
-rocketmq_group_get_latency_by_storetime{cluster="MQCluster",broker="broker-b",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",} 3215.0
-rocketmq_group_get_latency_by_storetime{cluster="MQCluster",broker="broker-a",topic="DEV_TID_tfq",group="DEV_CID_cfq",} 0.0
-rocketmq_group_get_latency_by_storetime{cluster="MQCluster",broker="broker-a",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",} 3232.0
-rocketmq_group_get_latency_by_storetime{cluster="MQCluster",broker="broker-b",topic="DEV_TID_tfq",group="DEV_CID_cfq",} 0.0
-```
-
-Grafana Dashboard
--------
-Grafana Dashboard ID: 10477, name: RocketMQ Exporter Overview.
-For details of the dashboard please see [RocketMQ Exporter Overview](https://grafana.com/dashboards/10477).
-
-Use Example
--------------
+RocketMQ_exporter
+==============
+
+RocketMQ exporter for Prometheus.
+
+Table of Contents
+-----------------
+-	[Compatibility](#compatibility)
+-   [Dependency](#dependency)
+-   [Download](#download)
+-   [Compile](#compile)
+	-   [Build Binary](#build-binary)
+	-   [Build Docker Image](#build-docker-image)
+-   [Run](#run)
+	-   [Run Binary](#run-binary)
+	-   [Run Docker Image](#run-docker-image)
+-   [Flags](#flags)
+-   [Metrics](#metrics)
+	-   [Brokers](#brokers)
+	-   [Topics](#topics)
+	-   [Consumer Groups](#consumer-groups)
+-   [Grafana Dashboard](#Grafana-Dashboard)
+-   [Use Example](#Use-Example)
+
+Compatibility
+-------------
+
+Support [Apache RocketMQ](https://rocketmq.apache.org) version 4.3.2 (and later).
+
+Dependency
+----------
+
+-	[Prometheus](https://prometheus.io)
+
+Compile
+-------
+
+### Build Binary
+
+```shell
+mvn clean install
+```
+
+### Build Docker Image
+
+```shell
+mvn package -Dmaven.test.skip=true docker:build
+```
+
+Run
+---
+
+### Run Binary
+
+```shell
+java -jar rocketmq-exporter-0.0.1-SNAPSHOT.jar
+```
+
+### Run Docker Image
+
+```
+docker container run -itd --rm  -p 5557:5557  docker.io/rocketmq-exporter
+```
+
+Flags
+---
+
+This image is configurable using different flags
+
+|Flag name                           | Default            | Description                                        |
+| -----------------------------------|--------------------|----------------------------------------------------|
+| `rocketmq.config.namesrvAddr`      |  127.0.0.1:9876 |name server address  for  broker cluster            |
+| `rocketmq.config.webTelemetryPath` | /metrics           |Path under which to expose metrics                  |
+| `server.port`                      | 5557               |Address to listen on for web interface and telemetry|
+| `rocketmq.config.rocketmqVersion`  | V4_3_2             |rocketmq broker version                             |
+
+Metrics
+-------
+
+Documents about exposed Prometheus metrics.
+
+### Broker 
+
+**Metrics details**
+
+| Name         | Exposed information                                  |
+| ------------ | ---------------------------------------------------- |
+| `rocketmq_broker_tps` | Broker produces the number of messages per second |
+| `rocketmq_broker_qps` | Broker consumes messages per second |
+
+**Metrics output example**
+
+```txt
+# HELP rocketmq_broker_tps BrokerPutNums
+# TYPE rocketmq_broker_tps gauge
+rocketmq_broker_tps{cluster="MQCluster",broker="broker-a",} 7.0
+rocketmq_broker_tps{cluster="MQCluster",broker="broker-b",} 7.0
+# HELP rocketmq_broker_qps BrokerGetNums
+# TYPE rocketmq_broker_qps gauge
+rocketmq_broker_qps{cluster="MQCluster",broker="broker-a",} 8.0
+rocketmq_broker_qps{cluster="MQCluster",broker="broker-b",} 8.0
+```
+
+### Topics
+
+**Metrics details**
+
+| Name                | Exposed information                                |
+| ------------------- | -------------------------------------------------- |
+| `rocketmq_producer_tps`      | The number of messages produced per second per topic |
+| `rocketmq_producer_message_size` | The size of a message produced per second by a topic (in bytes) |
+| `rocketmq_producer_offset`   | The progress of a topic's production message |
+
+**Metrics output example**
+
+```txt
+# HELP rocketmq_producer_tps TopicPutNums
+# TYPE rocketmq_producer_tps gauge
+rocketmq_producer_tps{cluster="MQCluster",broker="broker-a",topic="DEV_TID_topic_tfq",} 7.0
+rocketmq_producer_tps{cluster="MQCluster",broker="broker-b",topic="DEV_TID_topic_tfq",} 7.0
+# HELP rocketmq_producer_message_size TopicPutMessageSize
+# TYPE rocketmq_producer_message_size gauge
+rocketmq_producer_message_size{cluster="MQCluster",broker="broker-a",topic="DEV_TID_topic_tfq",} 1642.0
+rocketmq_producer_message_size{cluster="MQCluster",broker="broker-b",topic="DEV_TID_topic_tfq",} 1638.0
+# HELP rocketmq_producer_offset TopicOffset
+# TYPE rocketmq_producer_offset counter
+rocketmq_producer_offset{cluster="MQCluster",broker="broker-a",topic="TBW102",} 0.0
+rocketmq_producer_offset{cluster="MQCluster",broker="broker-b",topic="DEV_TID_tfq",} 1878633.0
+rocketmq_producer_offset{cluster="MQCluster",broker="broker-a",topic="DEV_TID_tfq",} 3843787.0
+rocketmq_producer_offset{cluster="MQCluster",broker="broker-b",topic="DEV_TID_20190304",} 0.0
+rocketmq_producer_offset{cluster="MQCluster",broker="broker-a",topic="BenchmarkTest",} 0.0
+rocketmq_producer_offset{cluster="MQCluster",broker="broker-b",topic="DEV_TID_20190305",} 0.0
+rocketmq_producer_offset{cluster="MQCluster",broker="broker-b",topic="MQCluster",} 0.0
+rocketmq_producer_offset{cluster="MQCluster",broker="broker-a",topic="DEV_TID_topic_tfq",} 2798195.0
+rocketmq_producer_offset{cluster="MQCluster",broker="broker-b",topic="BenchmarkTest",} 0.0
+rocketmq_producer_offset{cluster="MQCluster",broker="broker-b",topic="DEV_TID_topic_tfq",} 1459666.0
+rocketmq_producer_offset{cluster="MQCluster",broker="broker-a",topic="MQCluster",} 0.0
+rocketmq_producer_offset{cluster="MQCluster",broker="broker-a",topic="SELF_TEST_TOPIC",} 0.0
+rocketmq_producer_offset{cluster="MQCluster",broker="broker-a",topic="OFFSET_MOVED_EVENT",} 0.0
+rocketmq_producer_offset{cluster="MQCluster",broker="broker-b",topic="broker-b",} 0.0
+rocketmq_producer_offset{cluster="MQCluster",broker="broker-a",topic="broker-a",} 0.0
+rocketmq_producer_offset{cluster="MQCluster",broker="broker-b",topic="SELF_TEST_TOPIC",} 0.0
+rocketmq_producer_offset{cluster="MQCluster",broker="broker-b",topic="RMQ_SYS_TRANS_HALF_TOPIC",} 0.0
+rocketmq_producer_offset{cluster="MQCluster",broker="broker-a",topic="DEV_TID_20190305",} 0.0
+rocketmq_producer_offset{cluster="MQCluster",broker="broker-b",topic="OFFSET_MOVED_EVENT",} 0.0
+rocketmq_producer_offset{cluster="MQCluster",broker="broker-a",topic="RMQ_SYS_TRANS_HALF_TOPIC",} 0.0
+rocketmq_producer_offset{cluster="MQCluster",broker="broker-b",topic="TBW102",} 0.0
+rocketmq_producer_offset{cluster="MQCluster",broker="broker-a",topic="DEV_TID_20190304",} 0.0
+
+```
+
+### Consumer Groups
+
+**Metrics details**
+
+| Name                                                         | Exposed information                                          |
+| ------------------------------------------------------------ | ------------------------------------------------------------ |
+| `rocketmq_consumer_tps`                                      | The number of messages consumed per second by a consumer group |
+| `rocketmq_consumer_message_size`                             | The size of the message consumed by the consumer group per second (in bytes) |
+| `rocketmq_consumer_offset`                                   | Progress of consumption message for a consumer group         |
+| `rocketmq_group_get_latency`                                 | Consumer latency on some topic for one queue                 |
+| `rocketmq_group_get_latency_by_storetime `                   | Consumption delay time of a consumer group                   |
+| `rocketmq_message_accumulation`| How far Consumer offset lag behind |
+
+**Metrics output example**
+
+```txt
+# HELP rocketmq_consumer_tps GroupGetNums
+# TYPE rocketmq_consumer_tps gauge
+rocketmq_consumer_tps{cluster="MQCluster",broker="broker-b",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",} 7.0
+rocketmq_consumer_tps{cluster="MQCluster",broker="broker-a",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",} 7.0
+# HELP rocketmq_consumer_message_size GroupGetMessageSize
+# TYPE rocketmq_consumer_message_size gauge
+rocketmq_consumer_message_size{cluster="MQCluster",broker="broker-b",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",} 1638.0
+rocketmq_consumer_message_size{cluster="MQCluster",broker="broker-a",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",} 1642.0
+# HELP rocketmq_consumer_offset GroupOffset
+# TYPE rocketmq_consumer_offset counter
+rocketmq_consumer_offset{cluster="MQCluster",broker="broker-b",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",} 1462030.0
+rocketmq_consumer_offset{cluster="MQCluster",broker="broker-a",topic="DEV_TID_tfq",group="DEV_CID_cfq",} 3843787.0
+rocketmq_consumer_offset{cluster="MQCluster",broker="broker-a",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",} 2800569.0
+rocketmq_consumer_offset{cluster="MQCluster",broker="broker-b",topic="DEV_TID_tfq",group="DEV_CID_cfq",} 1878633.0
+# HELP rocketmq_group_get_latency GroupGetLatency
+# TYPE rocketmq_group_get_latency gauge
+rocketmq_group_get_latency{cluster="MQCluster",broker="broker-b",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",queueid="0",} 0.05
+rocketmq_group_get_latency{cluster="MQCluster",broker="broker-b",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",queueid="1",} 0.0
+rocketmq_group_get_latency{cluster="MQCluster",broker="broker-a",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",queueid="7",} 0.05
+rocketmq_group_get_latency{cluster="MQCluster",broker="broker-b",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",queueid="6",} 0.01
+rocketmq_group_get_latency{cluster="MQCluster",broker="broker-a",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",queueid="3",} 0.0
+rocketmq_group_get_latency{cluster="MQCluster",broker="broker-b",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",queueid="7",} 0.03
+rocketmq_group_get_latency{cluster="MQCluster",broker="broker-a",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",queueid="4",} 0.0
+rocketmq_group_get_latency{cluster="MQCluster",broker="broker-a",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",queueid="5",} 0.03
+rocketmq_group_get_latency{cluster="MQCluster",broker="broker-a",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",queueid="6",} 0.01
+rocketmq_group_get_latency{cluster="MQCluster",broker="broker-b",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",queueid="2",} 0.0
+rocketmq_group_get_latency{cluster="MQCluster",broker="broker-b",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",queueid="3",} 0.0
+rocketmq_group_get_latency{cluster="MQCluster",broker="broker-a",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",queueid="0",} 0.0
+rocketmq_group_get_latency{cluster="MQCluster",broker="broker-b",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",queueid="4",} 0.0
+rocketmq_group_get_latency{cluster="MQCluster",broker="broker-a",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",queueid="1",} 0.03
+rocketmq_group_get_latency{cluster="MQCluster",broker="broker-b",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",queueid="5",} 0.0
+rocketmq_group_get_latency{cluster="MQCluster",broker="broker-a",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",queueid="2",} 0.0
+# HELP rocketmq_group_get_latency_by_storetime GroupGetLatencyByStoreTime
+# TYPE rocketmq_group_get_latency_by_storetime gauge
+rocketmq_group_get_latency_by_storetime{cluster="MQCluster",broker="broker-b",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",} 3215.0
+rocketmq_group_get_latency_by_storetime{cluster="MQCluster",broker="broker-a",topic="DEV_TID_tfq",group="DEV_CID_cfq",} 0.0
+rocketmq_group_get_latency_by_storetime{cluster="MQCluster",broker="broker-a",topic="DEV_TID_topic_tfq",group="DEV_CID_consumer_cfq",} 3232.0
+rocketmq_group_get_latency_by_storetime{cluster="MQCluster",broker="broker-b",topic="DEV_TID_tfq",group="DEV_CID_cfq",} 0.0
+```
+
+Grafana Dashboard
+-------
+Grafana Dashboard ID: 10477, name: RocketMQ Exporter Overview.
+For details of the dashboard please see [RocketMQ Exporter Overview](https://grafana.com/dashboards/10477).
+
+Use Example
+-------------
 For details of the use example please refer to [use example](./rocketmq_exporter_use_example.md)
\ No newline at end of file
diff --git a/src/main/docker/Dockerfile b/src/main/docker/Dockerfile
index 27f209c..cae410d 100644
--- a/src/main/docker/Dockerfile
+++ b/src/main/docker/Dockerfile
@@ -1,5 +1,5 @@
 FROM java:8
 MAINTAINER breeze
-ADD rocketmq-exporter-0.0.1-SNAPSHOT.jar demo.jar
+ADD rocketmq-exporter-0.0.1-SNAPSHOT.jar quickstart.jar
 EXPOSE 5557
-ENTRYPOINT ["java","-jar","demo.jar"]
+ENTRYPOINT ["java","-jar","quickstart.jar"]
diff --git a/src/main/java/org/apache/rocketmq/exporter/RocketMQExporterApplication.java b/src/main/java/org/apache/rocketmq/exporter/RocketMQExporterApplication.java
index 0866aef..05c5654 100644
--- a/src/main/java/org/apache/rocketmq/exporter/RocketMQExporterApplication.java
+++ b/src/main/java/org/apache/rocketmq/exporter/RocketMQExporterApplication.java
@@ -17,12 +17,10 @@
 package org.apache.rocketmq.exporter;
 
 import org.springframework.boot.SpringApplication;
-import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.boot.web.servlet.ServletComponentScan;
 import org.springframework.scheduling.annotation.EnableScheduling;
 
-@EnableAutoConfiguration
 @SpringBootApplication
 @ServletComponentScan
 @EnableScheduling
diff --git a/src/main/java/org/apache/rocketmq/exporter/aspect/admin/MQAdminAspect.java b/src/main/java/org/apache/rocketmq/exporter/aspect/admin/MQAdminAspect.java
index bc3c38e..6b5435f 100644
--- a/src/main/java/org/apache/rocketmq/exporter/aspect/admin/MQAdminAspect.java
+++ b/src/main/java/org/apache/rocketmq/exporter/aspect/admin/MQAdminAspect.java
@@ -49,7 +49,7 @@
     @Around(value = "mQAdminMethodPointCut() || multiMQAdminMethodPointCut()")
     public Object aroundMQAdminMethod(ProceedingJoinPoint joinPoint) throws Throwable {
         long start = System.currentTimeMillis();
-        Object obj = null;
+        Object obj;
         try {
             MethodSignature signature = (MethodSignature)joinPoint.getSignature();
             Method method = signature.getMethod();
diff --git a/src/main/java/org/apache/rocketmq/exporter/service/RMQMetricsService.java b/src/main/java/org/apache/rocketmq/exporter/service/RMQMetricsService.java
index 3b2e403..c1f8802 100644
--- a/src/main/java/org/apache/rocketmq/exporter/service/RMQMetricsService.java
+++ b/src/main/java/org/apache/rocketmq/exporter/service/RMQMetricsService.java
@@ -24,6 +24,6 @@
 
 
 public interface RMQMetricsService  {
-    public RMQMetricsCollector getCollector();
-    public void Metrics(StringWriter writer) throws IOException;
+    RMQMetricsCollector getCollector();
+    void Metrics(StringWriter writer) throws IOException;
 }
diff --git a/src/main/java/org/apache/rocketmq/exporter/task/MetricsCollectTask.java b/src/main/java/org/apache/rocketmq/exporter/task/MetricsCollectTask.java
index 7797d2a..c6e6a5e 100644
--- a/src/main/java/org/apache/rocketmq/exporter/task/MetricsCollectTask.java
+++ b/src/main/java/org/apache/rocketmq/exporter/task/MetricsCollectTask.java
@@ -35,7 +35,7 @@
 import org.apache.rocketmq.exporter.config.RMQConfigure;
 import org.apache.rocketmq.exporter.service.RMQMetricsService;
 import org.apache.rocketmq.exporter.service.client.MQAdminExtImpl;
-import org.apache.rocketmq.exporter.util.Mix;
+import org.apache.rocketmq.exporter.util.Utils;
 import org.apache.rocketmq.store.stats.BrokerStatsManager;
 import org.apache.rocketmq.tools.admin.MQAdminExt;
 import org.slf4j.Logger;
@@ -159,14 +159,14 @@
                             BrokerStatsData bsd = null;
                             try {
                                 bsd = mqAdminExt.viewBrokerStatsData(masterAddr, BrokerStatsManager.TOPIC_PUT_NUMS, topic);
-                                metricsService.getCollector().AddTopicPutNumsMetric(bd.getCluster(), bd.getBrokerName(), topic, Mix.getFixedDouble(bsd.getStatsMinute().getTps()));
+                                metricsService.getCollector().AddTopicPutNumsMetric(bd.getCluster(), bd.getBrokerName(), topic, Utils.getFixedDouble(bsd.getStatsMinute().getTps()));
                             }
                             catch (Exception e) {
                                 log.info("error is " + e.getMessage());
                             }
                             try {
                                 bsd = mqAdminExt.viewBrokerStatsData(masterAddr, BrokerStatsManager.TOPIC_PUT_SIZE, topic);
-                                metricsService.getCollector().AddTopicPutSizeMetric(bd.getCluster(), bd.getBrokerName(), topic, Mix.getFixedDouble(bsd.getStatsMinute().getTps()));
+                                metricsService.getCollector().AddTopicPutSizeMetric(bd.getCluster(), bd.getBrokerName(), topic, Utils.getFixedDouble(bsd.getStatsMinute().getTps()));
                             }
                             catch (Exception e) {
                                 log.info("error is " + e.getMessage());
@@ -186,20 +186,20 @@
                                     BrokerStatsData bsd = null;
                                     try {
                                         bsd = mqAdminExt.viewBrokerStatsData(masterAddr, BrokerStatsManager.GROUP_GET_NUMS, statsKey);
-                                        metricsService.getCollector().AddGroupGetNumsMetric(bd.getCluster(), bd.getBrokerName(), topic, group, Mix.getFixedDouble(bsd.getStatsMinute().getTps()));
+                                        metricsService.getCollector().AddGroupGetNumsMetric(bd.getCluster(), bd.getBrokerName(), topic, group, Utils.getFixedDouble(bsd.getStatsMinute().getTps()));
                                     } catch (Exception e) {
                                         log.info("error is " + e.getMessage());
                                     }
                                     try {
                                         bsd = mqAdminExt.viewBrokerStatsData(masterAddr, BrokerStatsManager.GROUP_GET_SIZE, statsKey);
-                                        metricsService.getCollector().AddGroupGetSizeMetric(bd.getCluster(), bd.getBrokerName(), topic, group, Mix.getFixedDouble(bsd.getStatsMinute().getTps()));
+                                        metricsService.getCollector().AddGroupGetSizeMetric(bd.getCluster(), bd.getBrokerName(), topic, group, Utils.getFixedDouble(bsd.getStatsMinute().getTps()));
                                     } catch (Exception e) {
                                         log.info("error is " + e.getMessage());
                                     }
                                     try {
 
                                         bsd = mqAdminExt.viewBrokerStatsData(masterAddr, BrokerStatsManager.SNDBCK_PUT_NUMS, statsKey);
-                                        metricsService.getCollector().AddsendBackNumsMetric(bd.getCluster(), bd.getBrokerName(), topic, group, Mix.getFixedDouble(bsd.getStatsMinute().getTps()));
+                                        metricsService.getCollector().AddsendBackNumsMetric(bd.getCluster(), bd.getBrokerName(), topic, group, Utils.getFixedDouble(bsd.getStatsMinute().getTps()));
                                     } catch (Exception e) {
                                         log.info("error is " + e.getMessage());
                                     }
@@ -239,14 +239,14 @@
                         BrokerStatsData bsd = null;
                         try {
                             bsd = mqAdminExt.viewBrokerStatsData(masterAddr, BrokerStatsManager.BROKER_PUT_NUMS,clusterEntry.getValue().getCluster());
-                            metricsService.getCollector().AddBrokerPutNumsMetric(clusterEntry.getValue().getCluster(), clusterEntry.getValue().getBrokerName(), Mix.getFixedDouble(bsd.getStatsMinute().getTps()));
+                            metricsService.getCollector().AddBrokerPutNumsMetric(clusterEntry.getValue().getCluster(), clusterEntry.getValue().getBrokerName(), Utils.getFixedDouble(bsd.getStatsMinute().getTps()));
                         }
                         catch (Exception e) {
                             log.info("error is " + e.getMessage());
                         }
                         try {
                             bsd = mqAdminExt.viewBrokerStatsData(masterAddr, BrokerStatsManager.BROKER_GET_NUMS, clusterEntry.getValue().getCluster());
-                            metricsService.getCollector().AddBrokerGetNumsMetric(clusterEntry.getValue().getCluster(), clusterEntry.getValue().getBrokerName(), Mix.getFixedDouble(bsd.getStatsMinute().getTps()));
+                            metricsService.getCollector().AddBrokerGetNumsMetric(clusterEntry.getValue().getCluster(), clusterEntry.getValue().getBrokerName(), Utils.getFixedDouble(bsd.getStatsMinute().getTps()));
                         }
                         catch (Exception e) {
                             log.info("error is " + e.getMessage());
@@ -274,7 +274,7 @@
             statsKey = String.format("%d@%s@%s", queueId, topic, group);
             try {
                 bsd = mqAdminExt.viewBrokerStatsData(masterAddr, BrokerStatsManager.GROUP_GET_LATENCY, statsKey);
-                metricsService.getCollector().AddGroupGetLatencyMetric(bd.getCluster(), bd.getBrokerName(), topic, group, String.format("%d", queueId), Mix.getFixedDouble(bsd.getStatsMinute().getTps()));
+                metricsService.getCollector().AddGroupGetLatencyMetric(bd.getCluster(), bd.getBrokerName(), topic, group, String.format("%d", queueId), Utils.getFixedDouble(bsd.getStatsMinute().getTps()));
             } catch (Exception e) {
                 log.info("error is " + e.getMessage());
             }
diff --git a/src/main/java/org/apache/rocketmq/exporter/util/JsonUtil.java b/src/main/java/org/apache/rocketmq/exporter/util/JsonUtil.java
index a80e998..29317f9 100644
--- a/src/main/java/org/apache/rocketmq/exporter/util/JsonUtil.java
+++ b/src/main/java/org/apache/rocketmq/exporter/util/JsonUtil.java
@@ -47,7 +47,7 @@
         objectMapper.configure(SerializationFeature.WRITE_ENUMS_USING_TO_STRING, true);
         objectMapper.configure(DeserializationFeature.ACCEPT_SINGLE_VALUE_AS_ARRAY, true);
         objectMapper.disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);
-        objectMapper.setFilters(new SimpleFilterProvider().setFailOnUnknownId(false));
+        objectMapper.setFilterProvider(new SimpleFilterProvider().setFailOnUnknownId(false));
         objectMapper.setSerializationInclusion(JsonInclude.Include.NON_EMPTY);
         objectMapper.setDateFormat(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"));
     }
diff --git a/src/main/java/org/apache/rocketmq/exporter/util/Mix.java b/src/main/java/org/apache/rocketmq/exporter/util/Utils.java
similarity index 85%
rename from src/main/java/org/apache/rocketmq/exporter/util/Mix.java
rename to src/main/java/org/apache/rocketmq/exporter/util/Utils.java
index 469be71..ccdcabe 100644
--- a/src/main/java/org/apache/rocketmq/exporter/util/Mix.java
+++ b/src/main/java/org/apache/rocketmq/exporter/util/Utils.java
@@ -17,11 +17,11 @@
 
 package org.apache.rocketmq.exporter.util;
 
-public class Mix {
+import java.text.DecimalFormat;
+
+public class Utils {
     public static double getFixedDouble(double value) {
-        if (value >= 1) {
-            return Math.round(value);
-        }
-        return Math.round(value * 100) / 100.0;
+        DecimalFormat df = new DecimalFormat("#.##");
+        return new Double(df.format(value));
     }
 }
diff --git a/src/main/resources/application.properties b/src/main/resources/application.properties
index ad1d563..083738e 100644
--- a/src/main/resources/application.properties
+++ b/src/main/resources/application.properties
@@ -6,7 +6,7 @@
 spring.http.encoding.force=true
 logging.config=classpath:logback.xml
 #if this value is empty,use env value rocketmq.config.namesrvAddr  NAMESRV_ADDR
-rocketmq.config.namesrvAddr=192.168.0.48:9876
+rocketmq.config.namesrvAddr=127.0.0.1:9876
 
 
 rocketmq.config.enableCollect=true