Package org.elasticsearch.cluster.routing

Examples of org.elasticsearch.cluster.routing.ShardIterator.nextOrNull()

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                .build();

        ShardIterator shardIterator = routingTable.index("test1").shard(0).shardsRandomIt();
        ShardRouting shardRouting1 = shardIterator.nextOrNull();
        assertThat(shardRouting1, notNullValue());
        assertThat(shardIterator.nextOrNull(), notNullValue());
        assertThat(shardIterator.nextOrNull(), nullValue());

        shardIterator = routingTable.index("test1").shard(0).shardsRandomIt();
        ShardRouting shardRouting2 = shardIterator.nextOrNull();
        assertThat(shardRouting2, notNullValue());
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        ShardIterator shardIterator = routingTable.index("test1").shard(0).shardsRandomIt();
        ShardRouting shardRouting1 = shardIterator.nextOrNull();
        assertThat(shardRouting1, notNullValue());
        assertThat(shardIterator.nextOrNull(), notNullValue());
        assertThat(shardIterator.nextOrNull(), nullValue());

        shardIterator = routingTable.index("test1").shard(0).shardsRandomIt();
        ShardRouting shardRouting2 = shardIterator.nextOrNull();
        assertThat(shardRouting2, notNullValue());
        ShardRouting shardRouting3 = shardIterator.nextOrNull();
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        assertThat(shardRouting1, notNullValue());
        assertThat(shardIterator.nextOrNull(), notNullValue());
        assertThat(shardIterator.nextOrNull(), nullValue());

        shardIterator = routingTable.index("test1").shard(0).shardsRandomIt();
        ShardRouting shardRouting2 = shardIterator.nextOrNull();
        assertThat(shardRouting2, notNullValue());
        ShardRouting shardRouting3 = shardIterator.nextOrNull();
        assertThat(shardRouting3, notNullValue());
        assertThat(shardIterator.nextOrNull(), nullValue());
        assertThat(shardRouting1, not(sameInstance(shardRouting2)));
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        assertThat(shardIterator.nextOrNull(), nullValue());

        shardIterator = routingTable.index("test1").shard(0).shardsRandomIt();
        ShardRouting shardRouting2 = shardIterator.nextOrNull();
        assertThat(shardRouting2, notNullValue());
        ShardRouting shardRouting3 = shardIterator.nextOrNull();
        assertThat(shardRouting3, notNullValue());
        assertThat(shardIterator.nextOrNull(), nullValue());
        assertThat(shardRouting1, not(sameInstance(shardRouting2)));
        assertThat(shardRouting1, sameInstance(shardRouting3));
    }
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        shardIterator = routingTable.index("test1").shard(0).shardsRandomIt();
        ShardRouting shardRouting2 = shardIterator.nextOrNull();
        assertThat(shardRouting2, notNullValue());
        ShardRouting shardRouting3 = shardIterator.nextOrNull();
        assertThat(shardRouting3, notNullValue());
        assertThat(shardIterator.nextOrNull(), nullValue());
        assertThat(shardRouting1, not(sameInstance(shardRouting2)));
        assertThat(shardRouting1, sameInstance(shardRouting3));
    }
}
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        ShardRouting shard;
        Set<String> nodeIds = new HashSet<>();

        // check if one of the shards is on the current node;
        while ((shard = shards.nextOrNull()) != null) {
            if (!shard.active()) {
                continue;
            }
            if (shard.currentNodeId().equals(clusterService.localNode().getId())) {
                return null;
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    }

    // Redirects the request to a data node, that has the index meta data locally available.
    private void redirect(MoreLikeThisRequest request, String concreteIndex, final ActionListener<SearchResponse> listener, ClusterState clusterState) {
        ShardIterator shardIterator = clusterService.operationRouting().getShards(clusterState, concreteIndex, request.type(), request.id(), request.routing(), null);
        ShardRouting shardRouting = shardIterator.nextOrNull();
        if (shardRouting == null) {
            throw new ElasticsearchException("No shards for index " + request.index());
        }
        String nodeId = shardRouting.currentNodeId();
        DiscoveryNode discoveryNode = clusterState.nodes().get(nodeId);
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            return clusterState.routingTable().index(request.concreteIndex()).shard(request.request().shardId()).primaryShardIt();
        }
        ShardIterator shardIterator = clusterService.operationRouting()
                .indexShards(clusterState, request.concreteIndex(), request.request().type(), request.request().id(), request.request().routing());
        ShardRouting shard;
        while ((shard = shardIterator.nextOrNull()) != null) {
            if (shard.primary()) {
                return new PlainShardIterator(shardIterator.shardId(), ImmutableList.of(shard));
            }
        }
        return new PlainShardIterator(shardIterator.shardId(), ImmutableList.<ShardRouting>of());
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