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Code Issues Releases Wiki Activity

EWS: used paged search with static search condition, send a single request when folderSizeLimit is enabled

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git-svn-id: http://svn.code.sf.net/p/davmail/code/trunk@2290 3d1905a2-6b24-0410-a738-b14d5a86fcbd
This commit is contained in:
mguessan 2014-05-30 10:41:34 +00:00
parent 49148f9316
commit ffac479e60
1 changed files with 73 additions and 26 deletions
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97
src/java/davmail/exchange/ews/EwsExchangeSession.java
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@ -46,11 +46,11 @@ import java.util.*;
/**
* EWS Exchange adapter.
* Compatible with Exchange 2007 and hopefully 2010.
* Compatible with Exchange 2007, 2010 and 2013.
*/
public class EwsExchangeSession extends ExchangeSession {
protected static final int PAGE_SIZE = 100;
protected static final int PAGE_SIZE = 500;
protected static final String ARCHIVE_ROOT = "/archive/";
@ -725,17 +725,17 @@ public class EwsExchangeSession extends ExchangeSession {
}
protected List<EWSMethod.Item> searchItems(String folderPath, Set<String> attributes, Condition condition, FolderQueryTraversal folderQueryTraversal, int maxCount) throws IOException {
if (maxCount == 0) {
// unlimited search
return searchItems(folderPath, attributes, condition, folderQueryTraversal);
}
// limited search, do not use paged search, limit with maxCount, sort by imapUid descending to get latest items
int resultCount = 0;
List<EWSMethod.Item> results = new ArrayList<EWSMethod.Item>();
FindItemMethod findItemMethod;
do {
int fetchCount = PAGE_SIZE;
// adjust fetch count on last page request
if (maxCount > 0) {
fetchCount = Math.min(PAGE_SIZE, maxCount - resultCount);
}
// search items in folder, do not retrieve all properties
findItemMethod = new FindItemMethod(folderQueryTraversal, BaseShape.ID_ONLY, getFolderId(folderPath), 0, fetchCount);
findItemMethod = new FindItemMethod(folderQueryTraversal, BaseShape.ID_ONLY, getFolderId(folderPath), 0, maxCount);
for (String attribute : attributes) {
findItemMethod.addAdditionalProperty(Field.get(attribute));
}
@ -747,33 +747,80 @@ public class EwsExchangeSession extends ExchangeSession {
// always sort items by imapUid descending to retrieve recent messages first
findItemMethod.setFieldOrder(new FieldOrder(Field.get("imapUid"), FieldOrder.Order.Descending));
// use requested filter for first page
Condition localCondition = condition;
if (resultCount > 0) {
// adjust condition for next pages: retrieve only items with imapUid lower than current lowest
String lowestImapUid = results.get(results.size()-1).get(Field.get("imapUid").getResponseName());
if (localCondition == null || localCondition.isEmpty()) {
localCondition = lt("imapUid", lowestImapUid);
} else {
localCondition = and(lt("imapUid", lowestImapUid), condition);
}
}
if (localCondition != null && !localCondition.isEmpty()) {
findItemMethod.setSearchExpression((SearchExpression) localCondition);
if (condition != null && !condition.isEmpty()) {
findItemMethod.setSearchExpression((SearchExpression) condition);
}
executeMethod(findItemMethod);
results.addAll(findItemMethod.getResponseItems());
resultCount = results.size();
if (resultCount > 0 && LOGGER.isDebugEnabled()) {
LOGGER.debug("Folder " + folderPath + " - Search items count: " + resultCount + " maxCount: " + maxCount
+ " highest uid: " + results.get(0).get(Field.get("imapUid").getResponseName())
+ " lowest uid: " + results.get(resultCount - 1).get(Field.get("imapUid").getResponseName()));
}
return results;
}
/**
* Paged search, retrieve all items.
*
* @param folderPath folder path
* @param attributes attributes
* @param condition search condition
* @param folderQueryTraversal search mode
* @return items
* @throws IOException on error
*/
protected List<EWSMethod.Item> searchItems(String folderPath, Set<String> attributes, Condition condition, FolderQueryTraversal folderQueryTraversal) throws IOException {
int resultCount = 0;
List<EWSMethod.Item> results = new ArrayList<EWSMethod.Item>();
FolderId folderId = getFolderId(folderPath);
FindItemMethod findItemMethod;
do {
int fetchCount = PAGE_SIZE;
// search items in folder, do not retrieve all properties
findItemMethod = new FindItemMethod(folderQueryTraversal, BaseShape.ID_ONLY, folderId, resultCount, fetchCount);
for (String attribute : attributes) {
findItemMethod.addAdditionalProperty(Field.get(attribute));
}
// make sure imapUid is available
if (!attributes.contains("imapUid")) {
findItemMethod.addAdditionalProperty(Field.get("imapUid"));
}
// always sort items by imapUid ascending to retrieve pages in creation order
findItemMethod.setFieldOrder(new FieldOrder(Field.get("imapUid"), FieldOrder.Order.Ascending));
if (condition != null && !condition.isEmpty()) {
findItemMethod.setSearchExpression((SearchExpression) condition);
}
executeMethod(findItemMethod);
long highestUid = 0;
if (resultCount > 0) {
highestUid = Long.parseLong(results.get(resultCount-1).get(Field.get("imapUid").getResponseName()));
}
// Only add new result if not already available (concurrent folder changes issue)
for (EWSMethod.Item item:findItemMethod.getResponseItems()) {
long imapUid = Long.parseLong(item.get(Field.get("imapUid").getResponseName()));
if (imapUid > highestUid) {
results.add(item);
}
}
resultCount = results.size();
if (resultCount > 0 && LOGGER.isDebugEnabled()) {
LOGGER.debug("Folder " + folderPath + " - Search items current count: "+resultCount+" fetchCount: "+fetchCount
+" highest uid: "+results.get(0).get(Field.get("imapUid").getResponseName())
+" lowest uid: "+results.get(resultCount-1).get(Field.get("imapUid").getResponseName()));
+" highest uid: "+results.get(resultCount-1).get(Field.get("imapUid").getResponseName())
+" lowest uid: "+results.get(0).get(Field.get("imapUid").getResponseName()));
}
if (Thread.interrupted()) {
LOGGER.debug("Folder " + folderPath + " - Search items failed: Interrupted by client");
throw new IOException("Search items failed: Interrupted by client");
}
} while (!(findItemMethod.includesLastItemInRange || (maxCount > 0 && resultCount == maxCount)));
} while (!(findItemMethod.includesLastItemInRange));
return results;
}