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Great! You are now checking your business logic constraints by using attributes that are assigned at the metadata level instead of checks that are hidden in your source code. One interesting One interesting consideration that I have not yet mentioned is the following: what would happen if the first Organization object instantiates another Organization object and calls the Donate() method on the secondary object Will this call also go through the message sink In fact, in the current configuration it won t. This example just protects your class library from outside clients but doesn t affect any calls inside this context. This is because the CheckableAttribute s IsContextOK() only requests a new context when it s called from outside a checked context. To make all calls to Organization (no matter what their origin) go through the CheckerSink, you d have to change CheckableAttribute to return false from IsContextOK(): public override bool IsContextOK(Context ctx, IConstructionCallMessage ctor) { return false; } This will request a new context for each and every instance of any class that is marked with [Checkable] and that inherits from ContextBoundObject.

In general, smaller file system block sizes are best in cases where there are many small, random reads and writes, as when a volume is used for home directories or general file sharing. In cases such as these, the default 4KB block size is best. If, however, the workflow supported by the volume consists mostly of sequential reads or writes, as is the case for audio or video streaming or capture, you can get better performance with a larger block size. Try a 64KB block size in such cases.

In the next few sections, you ll look into different types of web forms and how they execute. First, you ll look at a typical HTML form and what goes on when the user submits it to the server.

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The RuleSetReference defines the set of rules (called a ruleset) for this policy, which is implemented by a RuleSet class. Select this property and click on the ellipses. The dialog shown in Figure 20-6 is displayed.

When you now start the server (and restart the client), you get the output shown in Figure 3-22, no matter if you used the [OneWay()] attribute or not. The interesting thing is that when using [OneWay()], the call to SetValue() finishes before the server completes the method. This is because in reality the client just ignores the server s response when using one-way method calls.

COM interop can occur in two ways (three, if you count recompiling a COM object with the /clr option). You can access a COM object from managed code, or you can expose your managed object as a COM object. Using a COM object from managed code involves creating a wrapper assembly that exposes the COM object via a set of managed wrapper classes and interfaces. The wrapper assembly can be created automatically from a type library or COM DLL or executable using tlbimp.exe. Using tlbimp.exe creates a set of wrapper classes with default marshaling of managed and native types. If you need more custom marshaling, you can also create these wrappers manually. The wrapper assembly may be referenced with #using, and you can then call into the COM objects, assuming they are properly registered. If you use #import (the usual way to import COM types from a DLL or type library) with managed code, this will cause code to be generated that is not compilable with /clr:pure or /clr:safe.

To create an Open Directory master using the command line, you could simply run the following command:

The <namespace> tag is completely dependent on the portal container used, and you should not rely on any specific formatting to parse out any data. Just use the <namespace> tag or the getNamespace() method on the portlet s RenderResponse object. Our JavaScript event handler would be rewritten to look like this:

Wait types that are specific to disk I/O include: ASYNC_IO_COMPLETION IO_COMPLETION IO_RETRY PAGEIOLATCH_* PAGELATCH_* WRITELOG If you are seeing these wait types as the bulk of your overall waits, then you will most likely want to examine your disk subsystem. Also keep in mind that sometimes issues with disk I/O can be related to memory pressure, so you will want to rule that out before sounding any alarms.

string -> LexBuffer<char> TextReader -> LexBuffer<char> BinaryReader -> LexBuffer<byte> LexBuffer<char> -> string Lexing.Position bool Lexing.Position

Let s look a little more closely at the most degenerate case where the available hash_area_size is much too small (or the statistics were sufficiently inaccurate that the optimizer made a very bad choice of the number of partitions needed for the hash table).

Many of the database tasks you saw earlier in this chapter can be easily performed using the built-in capabilities of Visual Studio. It also provides good tools for working with stored procedures and views, building SQL queries, and designing entity models.

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