I have implemented the Hellow world example, https://docs.corda.net/hello-world-running.html, on two machines. Where I am running Notary and Party A on one machine and Party B on another machine.
After posting the transaction, I am able to check transaction through Shell by running vault query but I am not getting any H2 DB URL to connect and check the transaction in H2 DB. Please help me know , where I can find the H2 DB URL? I think user name should sa and password null. I have installed the latest H2 DB on my systems.
Please help
I tried with DBVisulaiser but no Corda tables are reflecting in schema
You can override the H2 database URL by specifying the URL as below in build.gradle in deployNodes task.
node {
name "O=Notary,L=Delhi,C=IN"
notary = [validating : false]
p2pPort 10004
......
extraConfig = ['h2Settings.address' : 'localhost:1000']
}
Related
I am following this document-https://is.docs.wso2.com/en/5.9.0/setup/changing-datasource-bpsds/
deployment.toml Configurations.
[bps_database.config]
url = "jdbc:mysql://localhost:3306/IAMtest?useSSL=false"
username = "root"
password = "root"
driver = "com.mysql.jdbc.Driver"
Executing database scripts.
Navigate to <IS-HOME>/dbscripts. Execute the scripts in the following files, against the database created.
<IS-HOME>/dbscripts/bps/bpel/create/mysql.sql
<IS-HOME>/dbscripts/bps/bpel/drop/mysql-drop.sql
<IS-HOME>/dbscripts/bps/bpel/truncate/mysql-truncate.sql
Now create/mysql.sql creates table and the rest two file are responsible for deleting and trucating the same table..............what do i do?????????
Can anyone also tell the use case of BPS datasource??????
Please Help...........
You should only change your bps database if you have a requirement of using the workflow feature[1] in the wso2 identity server. It is mentioned in this documentation https://is.docs.wso2.com/en/5.9.0/setup/changing-to-mysql/
The document supposed to menstion the related db script. But it seems like mis leading. As it has requested to execute all three scripts. if you are using the workflow feature just use the
/dbscripts/bps/bpel/create/mysql.sql
script to create tables in you mysql database.
[1]. https://is.docs.wso2.com/en/5.9.0/learn/workflow-management/
I am using the latest H2 client to connect to my node's H2 database. However on connecting the client is unable to display the table names in the left panel and gives the following error.
Column "COLUMN_TYPE" not found; SQL statement: SELECT COLUMN_NAME, ORDINAL_POSITION, COLUMN_TYPE FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_SCHEMA = ? AND TABLE_NAME = ? [42122-198] 42S22/42122
My node is running a version 3.3-corda jar. Further, if I run a simple query to view one of the tables, the client simply states that the connection is lost. I have confirmed my nodes are still running. Could you please advise on how to address this or if there are any workarounds?
It looks like you are able to log into the database via the H2 client. The missing table might be result of bugs on implementing the schema.
Feel free to take a look at our samples of how to implement the schemas for querableStates:
Java version: https://github.com/corda/samples-java/tree/master/Features/queryablestate-carinsurance/contracts/src/main/java/net/corda/examples/carinsurance/schema
Kotlin version: https://github.com/corda/samples-kotlin/blob/master/Features/queryableState-carinsurance/contracts/src/main/kotlin/net/corda/samples/schema/InsuranceSchemaV1.kt
If we are trying to host corda node database in a SQL server can we host all of them in a single database? If yes how to do it and what will be its impact.
Can the built in H2 database which gets generated while a node is deployed be stored locally in a system such that data becomes permanent and is not lost in the next build?
Sharing an H2 database
As of Corda 3, each node spins up its own H2 database by default.
However, you can point multiple nodes to a single, stand-alone H2 database as follows:
Start a standalone H2 instance (e.g. java -jar ./h2/bin/h2-1.4.196.jar -webAllowOthers -tcpAllowOthers)
In the node.conf node configuration file, set dataSource.url = "jdbc:h2:tcp://localhost:9092/~/nodeUniqueDatabaseName", where nodeUniqueDatabaseName is unique to that node
For each nodeUniqueDatabaseName, H2 will create a file nodeUniqueDatabaseName.mv.db in the user's home directory.
You can also set a specific absolute path as well (e.g. dataSource.url = "jdbc:h2:tcp://localhost:9092/~/Users/szymonsztuka/IdeaProjects/corda3/nodeUniqueDatabaseName"). This will create a database file under Users/szymonsztuka/IdeaProjects/corda3/.
Note that this approach is not secure since the h2 server is started with -webAllowOthers -tcpAllowOthers, meaning that anyone can log in and modify the database.
Maintaining data across node builds
The H2 database is discarded when re-running deployNodes, because you are considered to be creating an entirely new set of nodes. If you only want to make changes to the installed CorDapps, you can shut down the node, update its CorDapps (by creating the new CorDapp JARs as described here and copying the CorDapp JARs into its cordapps folder) and restart the node. The new CorDapps will be installed, but the old node data will still be present.
Reference code :-
GIT clone url :- git clone https://github.com/corda/cordapp-tutorial
Release M14 :- git checkout -b release-M14.0
I am little bit confused about how the data flows in Corda. I have some database releated queries:
Whether the database structure is fixed or we can add our custom tables in it?
Where can I see the data flowing in tables, when I do a cash transaction which I can see in VAULT_CASH_BALANCES
table in my H2 database client but apart from cash I am unable to see any details of my other transactiosn i.e. if I
save a string then I am unable to get the information, I only get the transaction Id for that.
Is it possible to get entire data flow diagram?
Do the Node and Vault tables created every time when I build a code?
You can define how each state type is stored in the node by implementing the QueryableState interface. Each state type that implements QueryableState will have its own custom database table.
See https://github.com/corda/cordapp-tutorial/blob/master/kotlin-source/src/main/kotlin/com/example/state/IOUState.kt for an example. Since the IOU state implements a schema (in the Kotlin version of the CorDapp), you can see the sender, recipient and value from the H2 interface for each IOU state.
In the current implementation, the node's data is stored in the persistence.mv.db file of the deployed node. This will be wiped whenever you run gradlew deployNodes. However, if you simply create an updated CorDapp jar by running gradlew jar, you can then copy the updated CorDapp jar from build/libs into each node's plugins folder, and the node will use the new plugin.
I'm just starting with boxfuse and can't seem to find a way to get my dev database to be provisioned.
In my boxfuse.yml I have (for the database section):
database:
# the name of your JDBC driver
driverClass: com.mysql.jdbc.Driver
# the username
user: root
# the password
password: <password>
# the JDBC URL
url: jdbc:mysql://10.0.0.84:3306/dmsdb
# any properties specific to your JDBC driver:
properties:
charSet: UTF-8
hibernate.dialect: org.hibernate.dialect.MySQLInnoDBDialect
# the maximum amount of time to wait on an empty pool before throwing an exception
maxWaitForConnection: 1s
# the SQL query to run when validating a connection's liveness
validationQuery: "/* MyApplication Health Check */ SELECT 1"
# the minimum number of connections to keep open
minSize: 8
# the maximum number of connections to keep open
maxSize: 32
# whether or not idle connections should be validated
checkConnectionWhileIdle: false
If I try running it (boxfuse run), my application doesn't work at all.
boxfuse info produces the following:
oxfuse client v.1.18.7.938
Copyright 2016 Boxfuse GmbH. All rights reserved.
Account: mlr11 (mlr11)
Info about mlr11/dms-service in the dev environment:
App Type : Single Instance with Zero Downtime updates
App URL : http://127.0.0.1:8082
DB Type : MySQL database
DB URL : jdbc:mysql://localhost:3306/boxfuse-dev-db
DB Host : localhost
DB Port : 3306
DB Database : boxfuse-dev-db
DB User : boxfuse-dev-db
DB Password : boxfuse-dev-db
DB Status : available
Which is very different than what I was expecting. URL, Database, User, Password) are not matching my boxfuse.yml file.
What I am missing. I know it must be something simple. I did all kind of search and read the doc a few times. I can't seem to find what's wrong. Any pointers will be appreciated.
From the config file you posted I am assuming this is a dropwizard app.
Since your Boxfuse app was configured to use a MySQL database, Boxfuse automatically provisions a database in each environment when you first deploy your application there. In your case you can see the connection info for that database in the dev environment in the output you post in your question.
Boxfuse exposes these values (db url, user, password, ...) as environment variables (https://cloudcaptain.sh/docs/databases#envvars) and automatically configures your framework (Dropwizard I assume) to use those instead of the ones included in your config file. It will do so by passing -Ddw.database.url=$BOXFUSE_DATABASE_URL -Ddw.database.user=$BOXFUSE_DATABASE_USER -Ddw.database.password=$BOXFUSE_DATABASE_PASSWORD as arguments to the JVM.
Also doublecheck in the VirtualBox GUI that your VirtualBox installation is fully functional and able to start VMs and that both the Boxfuse Dev VM and the instance of your application are started properly.