A repository source instance is then used to establish connections to that source. A connector provides an implementation of the repositoryConnection interface, which defines methods for interacting with the external system. In particular, the execute(.) method takes an ExecutionContext instance and a request object. The object defines the environment in which the processing is occurring, including information about the jaas subject and LoginContext. The request object describes the requested operations on the content, with different concrete subclasses representing each type of activity. Examples of commands include (but not limited to) getting a node, moving a node, creating a node, changing a node, and deleting a node. And, if the repository source is able to participate in jta/jts distributed transactions, then the repositoryConnection must implement the getxaresource method by returning a valid ansaction. Xa.xaresource object that can be used by the transaction monitor.
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The modeShape connector system just makes it possible to interact with all these systems in the same way. Think of it this way: with ModeShape, you can use jcr to get to the schemas of multiple relational databases and the schemas defined by ddl files in your svn report repository and the schemas defined by logical models stored on your file system. Before we go further, let's define some terminology regarding connectors. A connector is the runnable code packaged in one or more jar files that contains implementations of several interfaces (described below). A java developer writes a connector to a type of source, such as a particular database management system, ldap directory, source code management system, etc. It is then packaged into one or more jar files (including dependent jars) and deployed for use in applications that use modeShape repositories. The description of a particular source system (e.g., the "Customer" database, or the company ldap system) is called a repository source. ModeShape defines a repositorysource interface that defines methods describing the behavior and supported features and a method for establishing connections. A connector will have a class that implements this interface and that has javabean properties for all of the connector-specific properties required to fully describe an instance of the system. Use of javabean properties is not required, but it is highly recommended, as it enables reflective configuration and administration. Applications that use modeShape create an instance of the connector's Repositorysource implementation and set the properties for the external source that the application wants to access with that connector.
And another to access existing databases so that some or all of the existing data (in whatever structure) can be accessed through jcr. Of course, if we don't have a connector to suit your needs, you can write your own. Future modeShape connectors Note you might be thinking that these connectors are interesting, but what do they really provide? Is it really useful to use jcr to access a relational database rather than jdbc? Or, why access the files on a file presentation system when there are already mechanisms to do that? Maybe putting jcr on top of a single system (like a jdbc database) isn't that interesting. What is interesting, though, is accessing the information in multiple systems as if all that information were in a single jcr repository. That's what the federated repository source is all about.
Your applications work with the jcr api, but through ModeShape you're able to accesses the content from where the information exists - not just a single purpose-built repository. This is fundamentally what makes ModeShape different. How does ModeShape do this? At the heart of ModeShape and it's jcr implementation is a simple connector system that is designed around creating and accessing graphs. The modeShape jcr implementation actually just sits on top of a single repository source, which it uses to access of the repositories content. ModeShape's jcr implementation delegates to a repository connector. That single repository connector could access: a transient, in-memory repository an Infinispan data grid that acts as an extremely scalable, highly-available store for repository content a jboss Cache instance that acts as a clustered and replicated store for repository content a jdbc database used. ModeShape can put jcr on top of multiple kinds of systems And the modeShape project has plans to create other connectors, too. For instance, we're going to build a connector to other jcr repositories.
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This matches what is configured in the "nf. Xml" and "operties" files. If you want to confirm that the security feature is working, change the password in target/operties to something else and re-run the application. After you select a assignment repository and try to view a directory with 'ls you will get a loginException! If you were to select the "Cars" repository and use some of the commands, you should see something similar to: Figure.4. .
navigating the cars repository, you can also choose to navigate the "Vehicles" repository, which projects the "Cars" repository content under the /Vehicles/Cars node, the "Airplanes" content under the /Vehicles/Airplanes branch, the "UFOs" content under the /Vehicles/UFOs branch, and the "Configuration" content under /modeshape:system. Try using the client to walk the different repositories. And while this is a contrived application, it does demonstrate the use of ModeShape to federate repositories about and provide access through jcr. As mentioned in the, introduction, one of the capabilities of ModeShape is to provide access through. Jcr to different kinds of repositories and storage systems.
Vehicles repository content is federated from the cars, airplanes, ufos, and Configuration repositories. To run the client application, go to the directory and type./. You should see the command-line client and its menus in your terminal: Figure.3. . Example Client, from this menu, you can see the list of repositories, select one, and navigate through that repository in a manner similar to a *nix command-line shell (although the client itself uses the jcr api to interact with the repositories). Here are some of the commands you can use: Table.1. . Repository client commands to navigate a repository.
CommandDescription pwd, print the path of the current node (e.g., the "working directory ls path, list the children and properties of the node at the supplied path, where " path " can be any relative path or absolute path. If " path " is not supplied, the current working node's path is used. Cd path, change to the specified node, where " path " can be any relative path or absolute path. For example, "cd alpha" changes the current node to be a child named "alpha "cd." changes the current node to the parent node; "cd /a/b" changes the current node to be the a/b" node. Exit, exit this repository and return the list of repositories. Note, the first time you access any repository, the application is automatically logging you in to modeShape's jaas-based security system. To make the application easier to use, it always logs in with the "jsmith" as the username and "secret" as the password.
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Running the repository example, the repository example consists of a client application that sets up three modeShape repositories (named "Cars "Airplanes and "UFOs and a federated repository vehicles that dynamically federates the information from the other three repositories. The client application allows you to interactively navigate each of these repositories just as you would navigate the directory structure on a file system. This collection of repositories is shown in the the following figure: Figure.1. . Repositories used in the example client. The "Cars" repository is an in-memory repository (using the In-Memory repository connector the "Aircraft" repository is a jpa repository (using an in-memory hsql database using the jpa repository connector and the "UFOs" repository is a file system repository (using the file system repository connector). The federated "Vehicles" repository content is federated from the other repositories and cached into the "Cache" repository. This is shown in the following figure: Figure.2. .
The output is dumped to the console, which in PowerShell ise is not a problem because it has a very large buffer. The next version of this will have assistant the option to write to a text file, which isn't much more difficult; I just didn't have the reference in front of me on how to do that. So what i've been doing is copy/pasting the text into word and finessing it from there. The next iteration of this solution is database-connected. I have been working on a powerShell-based solution to inventory all sql servers on a network, including information on Hosts, sql instances, databases, filegroups, and files; the data is all added dynamically to an inventory database from which reports can be run. The end result is to have a comprehensive look at who owns what data and what resources the business Units are consuming (e.g., do the hr division's databases take up more disk space than the Administration division's databases?) This security audit data will be grafted. If anyone's interested I can write about that, too. Chapter 4 walked through the process of downloading and building the examples, while the previous chapter showed how to run the sequencer example and walked through the code. In this chapter, we'll run the repository example and walk through that example code to see what it's doing.
of the instances and prepare a report for each of them. Provide some basic information about the instance. For each Instance: * Connect to the instance's "Logins" collection. For each Login: * Provide basic information about the login: * Whether it is sql or Windows security * When the login was created * What the login's default database is * Whether or not the login currently has database access (i.e., disabled. If the login has any database users (i.e., the is not null) then: * For Each Database: * If the database is online (i.e., its status is "Normal then: * Show the sql login and its associated Database Username * When it was created/modified. The output of this is a somewhat-formatted and fairly detailed look at what each person has access. I'm sure i could have done this a myriad of other ways, but I was in a hurry. Note that, depending on the number of logins and databases, this could chug for quite a while and output a lot of information (one instance i audited gave a 374-page report).
In Oracle everything you need is generated automatically as sql code, all you have to do is to compile/run it; and it comes with a basic crud application (actually only "R to inspect it). I have written a powerShell script to "walk" the security structure of each sql instance to find: Each Login (Windows or sql) * Its Server Roles * every database to which the login is mapped * The associated "Database User" for this login * Its. I wrote a script because gathering this information manually would be very, very time consuming. As far as i know, there is no function in sql server to collect all this information into one place. I guess I could have used a series of t-sql scripts to pull the info out by other means, but i am on a powerShell kick, and I wanted to do it this way. Besides, using my method, you can automate the process and audit multiple instances at once. I wrote this quick-and-dirty so there is no error handling. There is, of course, no warranty expressed word or implied and you should use caution when running this (or any other script you find on the Internet). That said, all of my calls to sql are read-only, so i don't think you'll have any problems.
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You don't say what database, and I don't see it in business the post tags. If it's for Oracle, i can recommend the approach that is built in in Designer: use journal tables. If it's for any other database, well, i basically recommend the same way, too. The way it works, in case you want to replicate it in another db, or maybe if you just want to understand it, is that for a table there is a shadow table created too, just a normal database table, with the same field specs. Through triggers, every action to any row in the table inserts a new row in the journal table with the new values, what action was taken, when, and by what user. You don't ever delete any rows (at least not for the last few months). Yes it'll grow big, easily millions of rows, but you can easily track the value for any record at any point in time since the journaling started or the old journal rows got last purged, and who made the last change.