ops$tkyte@ORA11GR2> create or replace directory "dir2" as "/tmp/"; Directory created. in Objective-C

Writer Data Matrix 2d barcode in Objective-C ops$tkyte@ORA11GR2> create or replace directory "dir2" as "/tmp/"; Directory created.

Figure 14-8. Laying out items with the StackPanel Try changing the Orientation of the StackPanel to Horizontal to see how it affects the positioning of the squares. StackPanel is a very useful control and is very flexible. It is used extensively to perform tasks such as laying out lists of elements and creating menus.
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Any state information maintained on these servers must be centralized when you re using a Web Farm. Since requests can be sent to any machine in the mix, a change in the memory of one machine won t show up in the memory of another. Session state, a feature of both classic ASP and ASP .NET, is an example of this type of user-specific, volatile information that s stored per browser instance. The canonical example of what goes in the Session is the user s shopping cart. This information must be maintained across different requests that the user makes. It must survive for the entire session that the user maintains with the application. While no solution was built into ASP for out-of-process sessions, it s accounted for in ASP.NET. Session information can be stored on a centralized state server, or it can be stored in SQL Server. When deciding to use out-of-process session state, keep in mind that only SQL Server provides a solution for n+1 reliability. If you re using the NT State Server and that box goes down, your session information is unavailable, which will, in all likelihood, severely impair (or take down) an application that s dependent on this information. Also be aware that session state in ASP .NET is application specific. ASP .NET provides no solution out of the box for sharing session information across IIS applications, which is unfortunate, because this is a common need. If you find yourself needing this type of information sharing, you ll have to code your own solution. If it s entirely untenable to move session information out of process, there is one other option. Load balancers support an option called client affinity, or sticky sessions. This means that once a load balancer sends a given user to a specific server, it continues to send that user to that server for the duration of the user s session (it sticks the user to that server). While this allows you to use in-process session information and still have an application that can scale out, it s not the most efficient load balancing algorithm you can employ. It s possible that some servers in the Farm will be under significantly more load than others. It depends on how long users stuck to a particular server use the application. If more users stuck to server A stick around, and those stuck to server B leave the application, server A could be under much more load than server B. This solution also doesn t provide for redundant availability of the application. If a server that a user is stuck to goes down, the user s session information goes down with it. While a good load balancer sends those users to a server that s still available, their session information will be lost, and depending on what s being stored there, their experience with the application will likely be somewhat less than ideal. Once again, storing session state in SQL Server is the only way to provide for redundancy when using this feature.
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The first step in the process, then, is to assemble a list of the nouns in the use case write-ups. By using a bit of judgment, you can eliminate a few nouns that are obviously not objects, but still end up with a good-sized list of potential business objects or entities, as shown in Table 6-1. Table 6-1. Potential Entities Discovered in the Initial Design Project manager Project name Administrator Resource Supervisor List of roles List of resources Project Start date List of projects Employee name List of assignments Assignment List of assigned resources Project number End date Employee Employee ID Role Date assigned
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This method yields about 104 requests per second. Clearly, you re not getting the gains you d expect to by moving to a stored procedure. You re simply not saving the database any work; you re just moving the SQL generating logic into another process. Next you ll try a dedicated stored procedure for each column the user can sort by. You ll dynamically generate these stored procedures (see SortIE.aspx in Web10). private void GenSprocs() { SqlConnection cn = new SqlConnection ConfigurationManager.ConnectionStrings ["localPubs"].ToString()); SqlCommand cm = new SqlCommand("select * from authors", cn); DataSet ds = new DataSet(); cn.Open(); SqlDataAdapter da = new SqlDataAdapter(cm); da.Fill(ds); foreach (DataColumn dc in ds.Tables[0].Columns) { string sql = "create procedure usp_SortAuthors_{0} as " + "select * from authors order by {0}"; sql = string.Format(sql, dc.ColumnName); cm = new SqlCommand(sql, cn); cm.ExecuteNonQuery(); } cn.Close(); } Now you ll modify the BindGrid method to dynamically build the name of the stored procedure you ll call (see SortIE.aspx in Web10). private void BindGrid(string sortExpr) { SqlConnection cn = new SqlConnection(ConfigurationManager.ConnectionStrings ["localPubs"].ToString()); SqlCommand cm = new SqlCommand (string.Format("usp_SortAuthors_{0}",sortExpr), cn); cm.CommandType = CommandType.StoredProcedure;
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have made changes only to the code files either through the Designer or by actually writing code all you need to do is update the assembly in the GAC. There is no need to redeploy the whole Feature to SharePoint. In this case, append a QUICK parameter at the end of the postbuild command line (after DEPLOY). Now upon a successful build, the GAC will be updated and IIS reset so that your new assembly is used. Just remember to take this parameter off if you make changes to forms or any of the XML files or they will not be updated.
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The ValidationRules class maintains a list of rules for each property. This implies that ValidationRules has information about each rule method. This is the purpose of the RuleMethod classes. There are three classes: RuleMethod, RuleMethod<T, R>, and AsyncRuleMethod. They all work much the same way, with minor variations that I ll discuss. Here s the declaration of the most basic RuleMethod class: internal class RuleMethod : IRuleMethod, IComparable, IComparable<IRuleMethod> It stores information about each rule, including a delegate reference to the rule method itself, a unique name for the rule, and any custom RuleArgs object that should be passed to the rule method. This information is stored in a set of fields with associated properties. The fields are declared like this: private private private private RuleHandler _handler; string _ruleName = String.Empty; RuleArgs _args; int _priority;
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of file has an xlsm file extension, as you can see in the sample files for this chapter.
To call a __fastcall function from managed code, you have to create a native wrapper function with another calling convention. Fortunately, the Win32 API and many other C-based libraries do not use this calling convention. For C++ classes, this isn t a problem, because __fastcall is not a valid calling convention for member functions. For the compilation models /clr:pure and /clr:safe, there are further restrictions regarding native calling conventions. If you compile with /clr:pure, you cannot implement managed functions with native calling conventions only __clrcall functions can be implemented. However, you can still declare functions with the calling conventions __cdecl, __stdcall, and __thiscall when you compile with /clr:pure. (This opens the door to the other direction of interoperability: calling native functions from managed code, which is discussed later in this chapter.) If you compile with /clr:safe, only __clrcall functions can be defined and called. Calling functions with native calling conventions implies that nonverifiable IL code is generated by the compiler. (There is an exception to this limitation of /clr:safe, but it is only of theoretical value and therefore not covered here.)
ops$tkyte@ORA9IR2> select sum(bytes) from v$sgastat where pool = "shared pool"; SUM(BYTES) ---------100663296 and the SHARED_POOL_SIZE parameter ops$tkyte@ORA9IR2> show parameter shared_pool_size NAME TYPE VALUE ------------------------------------ ----------- -----------------------------shared_pool_size big integer 83886080 other than the fact that the SUM(BYTES) FROM V$SGASTAT will always be larger than the SHARED_POOL_SIZE. The shared pool holds many other structures that are outside the scope of the corresponding parameter. The SHARED_POOL_SIZE is typically the largest contributor to the shared pool as reported by the SUM(BYTES), but it is not the only contributor. For example, the parameter CONTROL_FILES contributes 264 bytes per file to the "miscellaneous" section of the shared pool. It is unfortunate that the "shared pool" in V$SGASTAT and the parameter SHARED_POOL_SIZE are named as they are, since the parameter contributes to the size of the shared pool, but it is not the only contributor. In Oracle 10g and above, however, you should see a one-to-one correspondence between the two, assuming you are using manual SGA memory management (i.e., you have set the shared_pool_size parameter yourself): ops$tkyte@ORA10G> select sum(bytes)/1024/1024 mbytes 2 from v$sgastat where pool = "shared pool"; MBYTES ---------128 ops$tkyte@ORA10G> show parameter shared_pool_size; NAME TYPE VALUE ------------------------------------ ----------- -----------------------------shared_pool_size big integer 128M
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