DfsInserter: Optionally disable existing object check

When using a DfsInserter for high-throughput insertion of many
objects (analogous to git-fast-import), we don't necessarily want to
do a random object lookup for each. It'll be faster from the
inserter's perspective to insert the duplicate objects and let a later
GC handle the deduplication.

Change-Id: Ic97f5f01657b4525f157e6df66023f1f07fc1851

1 files changed, 11 insertions, 1 deletions

diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/dfs/DfsInserter.java b/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/dfs/DfsInserter.java
index f5673e83d1..3e8deac0f0 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/dfs/DfsInserter.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/dfs/DfsInserter.java
@@ -106,6 +106,7 @@ public class DfsInserter extends ObjectInserter {
 	DfsPackDescription packDsc;
 	PackStream packOut;
 	private boolean rollback;
+	private boolean checkExisting = true;
 
 	/**
 	 * Initialize a new inserter.
@@ -117,6 +118,15 @@ public class DfsInserter extends ObjectInserter {
 		this.db = db;
 	}
 
+	/**
+	 * @param check
+	 *            if false, will write out possibly-duplicate objects without
+	 *            first checking whether they exist in the repo; default is true.
+	 */
+	public void checkExisting(boolean check) {
+		checkExisting = check;
+	}
+
 	void setCompressionLevel(int compression) {
 		this.compression = compression;
 	}
@@ -138,7 +148,7 @@ public class DfsInserter extends ObjectInserter {
 		if (objectMap != null && objectMap.contains(id))
 			return id;
 		// Ignore unreachable (garbage) objects here.
-		if (db.has(id, true))
+		if (checkExisting && db.has(id, true))
 			return id;
 
 		long offset = beginObject(type, len);