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// file ExampleInventoryRead
// $Id: ExampleInventoryRead.java,v 1.9 2007/11/12 18:29:42 cwl Exp $
package je.gettingStarted;
import java.io.File;
import java.io.IOException;
import com.sleepycat.bind.EntryBinding;
import com.sleepycat.bind.serial.SerialBinding;
import com.sleepycat.bind.tuple.TupleBinding;
import com.sleepycat.je.Cursor;
import com.sleepycat.je.DatabaseEntry;
import com.sleepycat.je.DatabaseException;
import com.sleepycat.je.LockMode;
import com.sleepycat.je.OperationStatus;
import com.sleepycat.je.SecondaryCursor;
public class ExampleInventoryRead {
private static File myDbEnvPath =
new File("/tmp/JEDB");
// Encapsulates the database environment and databases.
private static MyDbEnv myDbEnv = new MyDbEnv();
private static TupleBinding inventoryBinding;
private static EntryBinding vendorBinding;
// The item to locate if the -s switch is used
private static String locateItem;
private static void usage() {
System.out.println("ExampleInventoryRead [-h <env directory>]" +
"[-s <item to locate>]");
System.exit(-1);
}
public static void main(String args[]) {
ExampleInventoryRead eir = new ExampleInventoryRead();
try {
eir.run(args);
} catch (DatabaseException dbe) {
System.err.println("ExampleInventoryRead: " + dbe.toString());
dbe.printStackTrace();
} finally {
myDbEnv.close();
}
System.out.println("All done.");
}
private void run(String args[])
throws DatabaseException {
// Parse the arguments list
parseArgs(args);
myDbEnv.setup(myDbEnvPath, // path to the environment home
true); // is this environment read-only?
// Setup our bindings.
inventoryBinding = new InventoryBinding();
vendorBinding =
new SerialBinding(myDbEnv.getClassCatalog(),
Vendor.class);
if (locateItem != null) {
showItem();
} else {
showAllInventory();
}
}
private void showItem() throws DatabaseException {
SecondaryCursor secCursor = null;
try {
// searchKey is the key that we want to find in the
// secondary db.
DatabaseEntry searchKey =
new DatabaseEntry(locateItem.getBytes("UTF-8"));
// foundKey and foundData are populated from the primary
// entry that is associated with the secondary db key.
DatabaseEntry foundKey = new DatabaseEntry();
DatabaseEntry foundData = new DatabaseEntry();
// open a secondary cursor
secCursor =
myDbEnv.getNameIndexDB().openSecondaryCursor(null, null);
// Search for the secondary database entry.
OperationStatus retVal =
secCursor.getSearchKey(searchKey, foundKey,
foundData, LockMode.DEFAULT);
// Display the entry, if one is found. Repeat until no more
// secondary duplicate entries are found
while(retVal == OperationStatus.SUCCESS) {
Inventory theInventory =
(Inventory)inventoryBinding.entryToObject(foundData);
displayInventoryRecord(foundKey, theInventory);
retVal = secCursor.getNextDup(searchKey, foundKey,
foundData, LockMode.DEFAULT);
}
} catch (Exception e) {
System.err.println("Error on inventory secondary cursor:");
System.err.println(e.toString());
e.printStackTrace();
} finally {
if (secCursor != null) {
secCursor.close();
}
}
}
private void showAllInventory()
throws DatabaseException {
// Get a cursor
Cursor cursor = myDbEnv.getInventoryDB().openCursor(null, null);
// DatabaseEntry objects used for reading records
DatabaseEntry foundKey = new DatabaseEntry();
DatabaseEntry foundData = new DatabaseEntry();
try { // always want to make sure the cursor gets closed
while (cursor.getNext(foundKey, foundData,
LockMode.DEFAULT) == OperationStatus.SUCCESS) {
Inventory theInventory =
(Inventory)inventoryBinding.entryToObject(foundData);
displayInventoryRecord(foundKey, theInventory);
}
} catch (Exception e) {
System.err.println("Error on inventory cursor:");
System.err.println(e.toString());
e.printStackTrace();
} finally {
cursor.close();
}
}
private void displayInventoryRecord(DatabaseEntry theKey,
Inventory theInventory)
throws DatabaseException {
DatabaseEntry searchKey = null;
try {
String theSKU = new String(theKey.getData(), "UTF-8");
System.out.println(theSKU + ":");
System.out.println("\t " + theInventory.getItemName());
System.out.println("\t " + theInventory.getCategory());
System.out.println("\t " + theInventory.getVendor());
System.out.println("\t\tNumber in stock: " +
theInventory.getVendorInventory());
System.out.println("\t\tPrice per unit: " +
theInventory.getVendorPrice());
System.out.println("\t\tContact: ");
searchKey =
new DatabaseEntry(theInventory.getVendor().getBytes("UTF-8"));
} catch (IOException willNeverOccur) {}
DatabaseEntry foundVendor = new DatabaseEntry();
if (myDbEnv.getVendorDB().get(null, searchKey, foundVendor,
LockMode.DEFAULT) != OperationStatus.SUCCESS) {
System.out.println("Could not find vendor: " +
theInventory.getVendor() + ".");
System.exit(-1);
} else {
Vendor theVendor =
(Vendor)vendorBinding.entryToObject(foundVendor);
System.out.println("\t\t " + theVendor.getAddress());
System.out.println("\t\t " + theVendor.getCity() + ", " +
theVendor.getState() + " " + theVendor.getZipcode());
System.out.println("\t\t Business Phone: " +
theVendor.getBusinessPhoneNumber());
System.out.println("\t\t Sales Rep: " +
theVendor.getRepName());
System.out.println("\t\t " +
theVendor.getRepPhoneNumber());
}
}
protected ExampleInventoryRead() {}
private static void parseArgs(String args[]) {
for(int i = 0; i < args.length; ++i) {
if (args[i].startsWith("-")) {
switch(args[i].charAt(1)) {
case 'h':
myDbEnvPath = new File(args[++i]);
break;
case 's':
locateItem = new String(args[++i]);
break;
default:
usage();
}
}
}
}
}
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